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  • 1
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    Increase in Population Exposure Due to Dry and Wet Extremes in India Under a Warming Climate (2021)
    Details
    Publication Date: 2021-06-30
    Description: Dry and wet extremes affect agricultural production, infrastructure, and socioeconomic well‐being of about 1.4 billion people in India. Despite the profound implications of dry and wet extremes, their changes in the observed and projected climate in India are not well quantified. Here, using the observations from multiple sources, we show that the area affected by dry extremes during the monsoon season (June–September) and water‐year (June–May) has significantly increased (~1% per decade; p value 〈 0.05) over the last six decades (1951–2015) in India. On the other hand, the area affected by wet extremes does not exhibit any significant trend over the same time period. Dry and wet extremes in the monsoon season are corroborated with the positive phase and negative phase of the sea surface temperature (SST) anomalies in the tropical Pacific Ocean (Niño 3.4 region). Global climate models (GCMs) project an increase of more than 25–30% (±3–6%) in the combined area affected by the dry and wet extremes in India by the end of the 21st century. The frequency of both dry and wet extreme years is also projected to increase in the majority of India (〉80%) under a warmer world if the global mean temperature rises above 1.5°C (or 2°C) from a preindustrial level. Moreover, the population exposed to the dry and wet extremes is likely to increase threefold under the projected 2°C warmer world. Therefore, limiting global mean temperature rise below 2°C can substantially reduce the area and population exposure due to dry and wet extremes in India.
    Description: Key Points: The area affected by dry extremes has significantly increased (~1% per decade) during 1951–2015 in India Climate models project increase in the combined area affected by the dry and wet extremes in India (25–30%) by the end of the 21st century The population exposed to the dry and wet extremes is likely to increase threefold under a (2°C) warmer world climate
    Description: Ministry of Earth Sciences (MoES) http://dx.doi.org/10.13039/501100001851
    Keywords: 551.6 ; dry extremes ; wet extremes ; CMIP5 ; population exposure ; SPEI ; India
    Type: article
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  • 2
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    Life history and behaviour of Indian prawns (2021)
    In:  http://aquaticcommons.org/id/eprint/16162 | 12051 | 2015-02-08 09:53:32 | 16162 | Society of Fisheries Technologists, India
    Details
    Publication Date: 2021-06-29
    Description: Studies on life history and behaviour of prawns form an essential background for the understanding of the disposition of their fisheries and for the formulation of effective methods of exploitation and measures of conservation.
    Keywords: Biology ; Fisheries ; Penaeus ; life history ; prawns ; India
    Repository Name: AquaDocs
    Type: article
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  • 3
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    Some observations on the problem of marine timber destroying organisms of Indian coasts (2021)
    In:  http://aquaticcommons.org/id/eprint/16159 | 12051 | 2015-02-08 09:49:17 | 16159 | Society of Fisheries Technologists, India
    Details
    Publication Date: 2021-06-29
    Description: In India the chief marine timber boring organisms are 2 species of Martesia, 28 species of shipworms, 4 species and a variety of Sphaeroma and 9 species of Limnoria besides bacteria and fungi. The occurrence, abundance and activity of the various species of borers show remarkable variations and fluctuations in the different harbours of India, each harbour or area having its own dominant set of species and an assemblage of less important forms. These species have their own characteristic preferences, life history and seasons of attachment and a scheme evolved for one locality may prove ineffective for another. Through a delicate and complex ecological adjustment the borers occurring in a locality have reached an interrelationship reducing interspecific and intraspecific competition. The seasons of settlement of the dominant borers in the different harbours of India are indicated. The need for a detailed biological enquiry is stressed.
    Keywords: Biology ; coastal waters ; wood ; boring organisms ; ecological distribution ; life history ; boring organisms ; Martesia ; Sphaeroma ; Limnoria ; India
    Repository Name: AquaDocs
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    Format: 87-97
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  • 4
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    Breeding behaviour in Macrobrachium rosenbergii (De Man) (2021)
    In:  http://aquaticcommons.org/id/eprint/16164 | 12051 | 2015-02-08 09:56:08 | 16164 | Society of Fisheries Technologists, India
    Details
    Publication Date: 2021-06-29
    Description: During the course of experimentations on the inducement of breeding in Macrobrachium rosenbergii (De Man) under laboratory conditions, detailed observations on the mating behaviour of the species have been made, which have been elaborated in this account. Various behaviour patterns have been analysed critically and the probable directive and releasive factors for these behaviour patterns discussed. Differences in behaviour of the male resulting from the introduction of another mature male in the arena have been described. An aberrant displacement activity which has been observed in one of the males has also been discussed.
    Keywords: Aquaculture ; Macrobrachium rosenbergii ; induced breeding ; freshwater crustaceans ; reproductive behaviour ; India
    Repository Name: AquaDocs
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    Format: 19-25
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  • 5
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    Deepwater prawns and lobsters off the Kerala coast (2021)
    In:  http://aquaticcommons.org/id/eprint/16168 | 12051 | 2015-02-09 07:21:54 | 16168 | Society of Fisheries Technologists, India
    Details
    Publication Date: 2021-06-29
    Description: Majority of the prawn catch of the Kerala coast comes from the inshore regions within the 10 fathom line. A bottom deposit formed of fine mud rich in humus is found to be the ideal condition for the penaeid prawns. Similarly the lobster is observed in large numbers at localised areas very near the coast in the crevices of rocks. Though it has been observed that prawns and lobsters exist in deep water as well under different conditions, our knowledge about these forms along the Indian coasts is very scanty, being restricted to the works of Spence Bate, Alcock, De Man and Ramadan. Recently, during the cruises of the University Research Vessel Conch off the Kerala Coast (1958-1963) two species of deep water prawns and one species of lobster were collected from depths 100 - 180 fathoms. Of these, Penaeopsis philippi is found in large numbers occupying an almost continuous bed extending from Anjengo to Mangalore, while P. rectacutus has a restricted appearance between Cochin and Calicut. However, some sort of year to year variation has also been observed regarding the abundance of the species at various stations. Peurulus sewelli has a more restricted distribution, the maximum number being found between Puvar and Cochin. Attempt has been made to correlate the occurrence of the species with the hydrological conditions at the bottom and the nature of the substratum. It is observed that Peurulus sewelli occupies a more or less hard bed formed of sand with shell fragments or stones and small percentage of silt, the bottom temperature at the stations varying from 11°C to l4°C. P. sewelli is a more or less permanent inhabitant of the edge of the continental shell off the Kerala Coast worthy of attention for detailed investigation with a view to explore the possibilities of commercial exploitation.
    Keywords: Biology ; Fisheries ; geographical distribution ; deep waters ; panaeopsis philippi ; peurulus sewelli ; panaeopsis rectacutus ; Kerala ; India
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    Format: 51-53
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  • 6
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    Fishing gear and methods of the river Brahmaputra in Assam (2021)
    In:  http://aquaticcommons.org/id/eprint/16196 | 12051 | 2015-02-10 08:04:16 | 16196 | Society of Fisheries Technologists, India
    Details
    Publication Date: 2021-06-30
    Description: Potentially the inland fishery resources of the country are of very high order. But the present level of their exploitation is far from optimum, mainly because of the inadequacies of the existing fishing gear and methods. There is vast scope for increasing the fish production from inland waters by improving the existing gear and methods. This would require a thorough study of the fishing gear and methods in vogue, of which very little is known at present. In the present communication the authors discuss the fishing gear and methods of the river Brahmaputra, in Assam, based on a survey carried out by them during January-February 1964. The survey covers a 640 km stretch of the Brahmaputra River, its important tributaries and connected bheels, from Dhubri to Dibrugarh. As a result of the survey about 19 types of fishing nets, which could be grouped into eight classes, were identified. The salient technological features of the gears and their methods of operation are discussed class-wise. The characteristics of the individual types are shown in tables. The materials used for gear and gear accessories, are briefly discussed. The classification and relative importance of different types of gear are examined. Besides, the influence of the ecological and topographical features of the river on the development of different types of fishing gears, is also discussed.
    Keywords: Fisheries ; fishing gears ; fishing methods ; Brahmaputra River ; Assam ; India
    Repository Name: AquaDocs
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    Format: 205-219
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  • 7
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    On the production and nutritive value of fish meal from Silver belly (Leiognathus spp.) landings at Rameswaram (2021)
    In:  http://aquaticcommons.org/id/eprint/16210 | 12051 | 2015-02-10 08:17:43 | 16210 | Society of Fisheries Technologists, India
    Details
    Publication Date: 2021-06-30
    Description: Silver belly (Leiognathus Spp.) forms a major fishery in recent years in the Rameswaram island but fetches for the fishermen very low prices ranging from Rs. 0.03 to 0.12/Kg only, there being practically no demand for the fish. The possibilities of utilizing this cheap fish are discussed and the processing method described. During the glut season the cost of production of Silver belly fish meal works out to competitive prices of Rs. 500 to 700/ton. The silver belly fish meal is of high quality with good protein content averaging 57.71% in commercial samples and 61.90% in laboratory samples and with a high pepsin digestibility of 90.0% to 92.5%. The essential amino acid composition of the Silver belly fish meal compares very favorably with other round fish meals, with high contents of lysine, leucine, arginine, isoleucine, methionine, phenyl alanine, threonine and valine. Since there is good demand for fish meal as poultry and cattle food both in the internal and external markets, there is good scope for large scale production and sale of fish meal.
    Keywords: Fisheries ; nutritive value ; fish meals ; Silver belly ; Leiognathus ; processing fishery products ; marketing ; Rameswaram ; Ramanathapuram ; Tamil Nadu ; India
    Repository Name: AquaDocs
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    Format: 52-58
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  • 8
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    Studies on the storage characteristics of Silver pomfret (Pampus argentus) transported to Bombay (2021)
    In:  http://aquaticcommons.org/id/eprint/16232 | 12051 | 2015-02-13 08:49:26 | 16232 | Society of Fisheries Technologists, India
    Details
    Publication Date: 2021-07-01
    Description: An investigation on the quality of pomfrets transported to Bombay from Gujarat coast and its subsequent changes during storage at room temperature and low temperature were carried out and the results reported. The pomfrets transported in boats having insulated holds were in better condition than those having non insulated holds. In general, the transported fish can be effectively stored in ice for 2 days, while the fish is in acceptable condition up to 4 days.
    Keywords: Fisheries ; Silver pomfret ; Pampus argentus ; storage methods ; quality control ; biochemical composition ; freezing storage ; fish storage ; Bombay ; Maharashtra ; India
    Repository Name: AquaDocs
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    Format: 71-77
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  • 9
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    The study of the sea state data collected from Bay of Bengal during 1964-65 (2021)
    In:  http://aquaticcommons.org/id/eprint/16288 | 12051 | 2015-03-09 15:15:30 | 16288 | Society of Fisheries Technologists, India
    Details
    Publication Date: 2021-07-02
    Description: The wave data collected on board Ins Kistna from Bay of Bengal during July to August, 1964 and January, February and April, 1965 are presented. The wave parameters are analyzed and given in a form most suitable for model testing of ships. The variation of wave height with Beaufort number is remarkable. Wave periods from 2 to 10 seconds are observed with maximum frequency in the range of 2 to 5 seconds. The heights and period obtained are compared with those obtained by previous workers for the North Atlantic region and Bay of Bengal. The influence of the wave period 2 to 5 seconds on the rolling, pitching and heaving periods of medium size vessels is also discussed.
    Keywords: Oceanography ; sea state ; data collection ; geophysical data ; design wave ; wave period ; wave height ; statistical analysis ; wave statistics ; dynamical oceanography ; Bay of Bengal ; India
    Repository Name: AquaDocs
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    Format: 21-26
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  • 10
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    A mechanical device for eradication of submerged aquatic weeds (2021)
    In:  http://aquaticcommons.org/id/eprint/16305 | 12051 | 2015-03-28 15:10:40 | 16305 | Society of Fisheries Technologists, India
    Details
    Publication Date: 2021-07-03
    Description: This paper embodies details and method of operation of a mechanical device developed for eradication of submerged aquatic weeds. The economics of operation is also discussed.
    Keywords: Biology ; aquatic weeds ; underwater weeds ; aquatic plants ; plant control ; harvesting machines ; eradication ; India
    Repository Name: AquaDocs
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    Format: 18-25
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  • 11
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    Fishing gear research at the Central Institute of Fisheries Technology (2021)
    In:  http://aquaticcommons.org/id/eprint/16284 | 12051 | 2015-03-09 15:10:46 | 16284 | Society of Fisheries Technologists, India
    Details
    Publication Date: 2021-07-02
    Description: The Craft and Gear Wing of the Central Institute of Fisheries Technology was established to develop the country's fishing boats and implements scientifically and systematically. The Wing was organized in the year 1957 as a part of the fisheries development schemes included under the Second Five Year Plan.
    Keywords: Fisheries ; fishing gears ; catching methods ; fishing technology ; artisanal fishing ; India
    Repository Name: AquaDocs
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  • 12
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    Role of technology in the development of fisheries (2021)
    In:  http://aquaticcommons.org/id/eprint/16285 | 12051 | 2015-03-09 15:13:13 | 16285 | Society of Fisheries Technologists, India
    Details
    Publication Date: 2021-07-02
    Description: The basic purpose of fishing is to catch/harvest as much fish as possible and reach it to the consumer as a wholesome, acceptable food, though fishery development programs are based on diverse objectives which include, besides the production of a valuable food, creation of employment opportunities, socio-economic uplift of the fishermen community, and earning foreign exchange through export. Both the production and the utilization of fish depend intrinsically on the efficient application of technology.
    Keywords: Fisheries ; fisheries technology ; fisheries development ; fishing gears ; catching methods ; fish preservation ; India
    Repository Name: AquaDocs
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    Format: 5-8
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  • 13
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    Seasonal variation in the chemical composition of pomfrets. Pt. 1. Black pomfret (Parastromateus niger) (2021)
    In:  http://aquaticcommons.org/id/eprint/16301 | 12051 | 2015-06-24 13:22:04 | 16301 | Society of Fisheries Technologists, India
    Details
    Publication Date: 2021-07-03
    Description: Seasonal variations in proximate composition of the different parts such as head, middle, tail and skin of black pomfret (Parastromateus niger) are reported over three years on monthly basis. The lean and fatty conditions of fish are discussed on the basis of spawning period, food and feeding activity, size group appearance and the gonadal maturity of the pomfret.
    Keywords: Biology ; chemical composition ; fatty acids ; reproductive cycle ; black pomfrets ; Parastromateus niger ; commercial fisheries ; India
    Repository Name: AquaDocs
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    Format: 113-122
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  • 14
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    Seasonal fluctuation in the distribution of eggs and larvae of flat fishes (Pleuronectiformes - Pisces) in the Cochin backwater (2021)
    In:  http://aquaticcommons.org/id/eprint/16329 | 12051 | 2015-03-28 14:08:49 | 16329 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-03
    Description: Attempts have been made to correlate the abundance of eggs and larvae of flat fishes belonging to families Cynoglossidae and Soleidae with the hydrographical parameters of the environment, particularly the salinity. The eggs and larvae were found to occur in the Cochin backwater during the pre-monsoon period but not during the south west monsoon period. During the south west monsoon period larvae belonging to very early stages were found at the marine end (Fairway Buoy). The continued or prolonged existence of very low salinity appears to restrict the distribution of flat fish larvae. In the post-monsoon period also the eggs and larvae were not found in regions of very low salinity. Larvae of Cynoglossus puncticeps (Richardson), C. brevis Gunther, C. cynoglossus (Ham. Buch), C. lida (Bleeker) and Solea heinii Steindachner were obtained in the collection taken from the estuary. From the data it is seen that each species has specific spawning period.
    Keywords: Biology ; fish eggs ; backwaters ; pleuronectiformes ; Cochin ; Kerala ; India
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    Format: 21-34
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  • 15
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    Stock dynamics of horse mackerel, megalaspis cordyla (Linnaeus) along northwest coast of India (2021)
    In:  http://aquaticcommons.org/id/eprint/16509 | 12051 | 2015-04-03 06:45:50 | 16509 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-06
    Description: The stock dynamics of horse mackerel, Megalaspis cordyla, along the northwest coast of India has been studied using length frequency data recorded from commercial landings and trawl catches of research-cum-training vessel M.F.V. Saraswati. The growth parameters for this species has been estimated to be L∞=54 cm and K=0.49 per annum. The natural and fishing mortality for the stock have been worked out to be 0.93 and 0.91 per annum respectively. The study indicated that the stock is fished at a safer fishing mortality level F sub(0.1), lower than F sub(msy) level.
    Description: Paper presented at the National Symposium on Aquacrops, 16-18 November 1994, Versova, Bombay (India)
    Keywords: Fisheries ; mackerel fisheries ; stock assessment ; population dynamics ; Megalaspis cordyla ; Maharashtra ; Gujarat ; India
    Repository Name: AquaDocs
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    Format: 115-119
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  • 16
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    Effect of vitamin E (α-Tocopherol) on protein content of Labeo rohita (Ham.) fry (2021)
    In:  http://aquaticcommons.org/id/eprint/16513 | 12051 | 2015-04-03 06:49:22 | 16513 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-06
    Description: Increase in body protein concentration was noted in the fry of rohu fed vitamin E at 0.0 mg, 25 mg, 50 mg, 75 mg 100 mg, 150 mg, 200 mg, 300 mg, and 400 mg/kg of formulated diet. The protein content of fry was found to be significantly different between the different levels of vitamin E. It was found to be maximum (18.7%) in the case of vitamin E at 75 mg/kg diet followed by vitamin E at 100 mg/kg diet. On increasing of vitamin E above 100 mg per kilogram diet there was further decline in the protein content of the fry. The protein increase, from the initial value (12.5%), were recorded to be 14.4%, control; 21.6%, 25 mg level; 31.2%, 50 mg level; 49.6%, 75 mg level; 45.6%, 100 mg level; 14.4%, 150 mg level; 28% 200 mg level; 29.6%, 300 mg level and 13.6% for 400 mg level in different experimental groups.
    Description: Paper presented at the National Symposium on Aquacrops, 16-18 November 1994, Versova, Bombay (India)
    Keywords: Aquaculture ; vitamin deficiencies ; freshwater fish ; Labeo rohita ; Bombay ; Maharashtra ; India
    Repository Name: AquaDocs
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    Format: 139-143
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  • 17
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    Integrated wastewater aquaculture (2021)
    In:  http://aquaticcommons.org/id/eprint/16520 | 12051 | 2015-04-03 07:00:21 | 16520 | Indian Fisheries Association
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    Publication Date: 2021-07-06
    Description: Utilization of wastewater in fish culture is based on nutrient recycling, which enhances primary productivity, planktonic biomass, macrophytes and benthic organisms which determine fish production. Production of fishes could be enhanced to 10 ton/ha through wastewater recycling by judicial stock manipulation and management. The fallow lands around a sewage fish farm could be utilized for agri-horticultural production by recycling both sludge and sewage water, resulting in a total agro production of about 110 ton/ha through rotational vegetable cropping. The potential for additional production of vegetables not only enhances revenue but also creates employment.
    Description: Paper presented at the National Symposium on Aquacrops, 16-18 November 1994, Versova, Bombay (India)
    Keywords: Aquaculture ; integrated aquaculture systems ; water quality ; aquaculture effluents ; wastewater facilities ; wastewater utilization ; wastewater aquaculture ; aquaculture techniques ; India
    Repository Name: AquaDocs
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    Format: 57-62
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  • 18
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    Role of fisheries extension officers in FFDA at Balasore (2021)
    In:  http://aquaticcommons.org/id/eprint/16528 | 12051 | 2015-04-03 07:10:19 | 16528 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-06
    Description: The first FFDA in Orissa state was established in the year 1976. The study was conducted in Balasore district of the State. The findings revealed that all of the FEOs were not well qualified but trained and experienced. The duration of training obtained varied from 3 to 10 months. An FEO has a large area under his jurisdiction. Cycle was used by most of the FEOs to visit the fish farmers which resulted in infrequent visits. The FEOs were not satisfied with the working conditions, promotion avenues and conveyance facilities. There was interference of political bodies in leasing out ponds. The amount of loan sanctioned was not adequate to start fish farming. They also revealed that marketing aspects were totally neglected by the FFDA.
    Description: Paper presented at the National Symposium on Aquacrops, 16-18 November 1994, Versova, Bombay (India)
    Keywords: Fisheries ; Management ; fisheries extention agencies ; Fish Farmers Development Agency ; aquaculture development ; fisheries development ; Basalore ; Orissa ; India
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    Format: 119-122
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  • 19
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    On the trend of prawn catches in bottom trawls in inshore waters off Kakinada (Andhra Pradesh) (2021)
    In:  http://aquaticcommons.org/id/eprint/16471 | 12051 | 2015-03-28 14:20:48 | 16471 | Society of Fisheries Technologists, India
    Details
    Publication Date: 2021-07-05
    Description: From the results of fishing operations during 3 years (from August 1963 to July 1966) attempts were made to study the extent of availability of prawns for bottom trawls. It was found that prawns formed 22.5% of the total catch on an average of the catch rate of 12.3 kg per trawling hour. The prawns were found to be abundant during two periods from November to February and again from April to July. The depth range of 11-15 m yielded better catch rate with best frequency of the optimum catch per hour.
    Keywords: Fisheries ; fishing boats ; fishing gears ; prawns fishery ; trawl nets ; catching efforts ; Kakinada ; Andrea Pradesh ; India
    Repository Name: AquaDocs
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  • 20
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    Underwater warp tension meter (2021)
    In:  http://aquaticcommons.org/id/eprint/16474 | 12051 | 2015-03-28 14:25:25 | 16474 | Society of Fisheries Technologists, India
    Details
    Publication Date: 2021-07-05
    Description: A self-contained electronic solid-state instrument capable of measuring the tension between the different parts of a trawl net in operation, has been designed and developed for the measurement in the range 0 to 300 kg with an accuracy of ± 2 kg. The instrument is useful for measuring the resistance to motion of various accessories of a trawl net. It consists of an inductive type underwater tension transducer and an electronic indicating meter kept on board the vessel, both the units being connected by electric cable.
    Keywords: Fisheries ; dynamometers ; line tensione meters ; otter boards ; fish trawling ; India
    Repository Name: AquaDocs
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    Format: 48-51
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  • 21
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    On the results of preliminary fishing trials with shark long lines in Veraval waters (2021)
    In:  http://aquaticcommons.org/id/eprint/16488 | 12051 | 2015-11-02 20:05:49 | 16488 | Society of Fisheries Technologists, India
    Details
    Publication Date: 2021-07-06
    Description: Experimental fishing operations with shark long lines were conducted in the sea off Veraval with a view to studying their efficiency and gathering information on the available resources of sharks to be used for planning the future gear investigations. The trials were undertaken in 1967, employing departmental fishing vessel "Fishtech No. IV" (10.9 m O.L. and 48 H.P. engine). A total of 5525 hooks were employed and 242 sharks weighing 8629 kg were landed. Data on composition of catch, weight of fishes landed, effectiveness of various baits in capture of different species of sharks and effectiveness of gear including its catch efficiency in this area were compiled. Bait preference was also observed in certain species of sharks caught. Chirocentrus dorab proved to be the cheapest and most effective bait in capture of all the three varieties of sharks landed.
    Description: Ramarao, S.V.S. sometimes cited as Rama Rao, S.V.S.
    Keywords: Fisheries ; fishing trials ; catch efficiency ; fishing gears ; sharks ; Veraval ; Gujarat ; India
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    Format: 150-157
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  • 22
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    Belly depth studies for shrimp trawls - Part II (2021)
    In:  http://aquaticcommons.org/id/eprint/16492 | 12051 | 2015-03-27 08:53:29 | 16492 | Society of Fisheries Technologists, India
    Details
    Publication Date: 2021-07-06
    Description: The paper details further experiments conducted for a reduction in the depth of belly of a 13.69 m (45') four seam shrimp trawl net. The investigations have given conclusive evidence that the optimum depth of belly for this particular trawl design should be 70 meshes.
    Description: Belly depth studies for shrimp trawls – Part I. IPFC occasional paper, 67/6.
    Keywords: Fisheries ; shrimp fishery ; trawl nets ; depth reduction ; catching efficiency ; India
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    Hydrobiological features of the Kerala backwaters during premonsoon and monsoon months (2021)
    In:  http://aquaticcommons.org/id/eprint/16495 | 12051 | 2015-03-27 08:59:16 | 16495 | Society of Fisheries Technologists, India
    Details
    Publication Date: 2021-07-06
    Description: The hydrobiological features like temperature, salinity,phytoplankton, zooplankton and bottom fauna at twelve stations in the Vembanad lake during pre-monsoon and monsoon months were studied and the results communicated in this paper.
    Keywords: Ecology ; backwaters ; hydrography ; flora ; fauna ; Willingdon island ; Vembanad lake ; Kerala ; India
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    Format: 190-194
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    Studies on the effect of compounded feeds on the growth of juvenile Banana prawn Penaeus merguiensis (2021)
    In:  http://aquaticcommons.org/id/eprint/16534 | 12051 | 2015-04-03 07:15:39 | 16534 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-06
    Description: Laboratory experiments were conducted to determine the effect of compounded feeds on growth of juveniles (3 to 4 cm) of the Banana prawn Penaeus merguiensis. In all, seven diets were prepared with different combinations of locally available ingredients. Diascure, a local tuber was used as source of carbohydrate and vitamin mineral mixture (1%) was used in all the diets. The results indicated that diets with groundnut cake (diet 2, 3, 5 and 7) produced better survival and growth. In diets 4 and 6 growth was good but survival was very poor. Amongst all the diets, diet 7 produced significantly better growth, survival and food conversion ratio.
    Description: Paper presented at the National Symposium on Aquacrops, 16-18 November 1994, Versova, Bombay (India)
    Keywords: Aquaculture ; Banana prawn ; Penaeus merguiensis ; growth rate ; feeding experiments ; freshwater aquaculture ; Maharashtra ; India
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    A record production from an integrated farming system utilising sewage enriched water (2021)
    In:  http://aquaticcommons.org/id/eprint/16536 | 12051 | 2015-04-08 19:01:46 | 16536 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-06
    Description: The results of experiments conducted on a pond dyke (655m²) in the Wastewater Aquaculture Division of the Central Institute of Freshwater Aquaculture, Rahara, during 1992-93 for maximising production through optimum utilisation of resources are communicated. Round the year intensive cultivation of okra (Abelmoschus esculentus), amaranth (Amaranthus gangeticus and A. viridus), water-bind weed (Ipomea aquatica), Indian spinach (Basella rubra), radish (Raphanus sativum), amaranth (Amaranthus viridis), cauliflower (Brassica oleracia var. votrytis), cabbage (Brassica oleracia var. capitota) and papaya (Carica papaya) was undertaken using the treated sewage water from fish ponds for irrigation. The pond dyke yielded 5,626.5 kg vegetable which worked out to 85.9 tons per ha per year. Multiple cropping with these vegetables excluding papaya on a 460 m² dyke recorded a production of 4,926.5 kg at the rate of 107.1t per ha/yr. An improved yearly net return of about 35% over investment could be achieved through the selection of highly productive and pest resistant vegetable crops of longer duration for integration into the system. Introduction of this type of integrated farming would enhance the overall productivity and returns from farming.
    Description: Paper presented at the National Symposium on Aquacrops, 16-18 November 1994, Versova, Bombay (India)
    Keywords: Aquaculture ; Abelmoschus esculentus ; Amaranthus gangeticus ; Amaranthus viridus ; Ipomea aquatica ; Basella rubra ; Raphanus sativum ; Brassica oleracia ; Carica papaya ; polyculture experiments ; integrated aquaculture system ; vegetable cultivation ; sewage water ; India
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    Economic feasibility of composite fish culture in leased-in village tanks of Kanyakumari district: an invesment analysis (2021)
    In:  http://aquaticcommons.org/id/eprint/16547 | 12051 | 2015-04-03 07:25:15 | 16547 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-06
    Description: Kanyakumari district belonging to the high rainfall zone has resource advantages for composite fish culture in the leased-in village tanks. There are more than 400 fish farmers operating in leased-in tanks following composite fish culture under the FFDA programme. To estimate the economic feasibility and financial viability of the enterprise, the present study was taken up. 38 fish farmers selected from the district provided the necessary information like capital investment, costs and return and constraints. The data collected were analysed and a farm nearest to the average farm situation was taken as the representative farm. Investment criteria like PayBack Period (PBP), Simple Rate of Returns (SRR), Net Present Value (NPV) and Benefit Cost Ratio (BCR) were estimated taking into account a period of 10 years, the period for which the village tanks are leased-out to fish farmers under the FFDA programme. The analysis indicated the profitability of composite fish culture in village tanks in the district and the results are discussed with recommendations.
    Description: Paper presented at the National Symposium on Aquacrops, 16-18 November 1994, Versova, Bombay (India)
    Keywords: Aquaculture ; freshwater fish culture ; economic feasibility ; cost analysis ; Kanyakumari ; Tamil Nadu ; India
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    Dried fish cakes with improved texture (2021)
    In:  http://aquaticcommons.org/id/eprint/16549 | 12051 | 2015-11-04 15:07:23 | 16549 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-06
    Description: To overcome the problem of underutilization of marine by-catches, Basu et al. (1985) developed fish cube from minced fish meat. Although the product was acceptable, it had little rubbery texture. An attempt was made to improve the texture of the cake by several methods. It was found that 5% tapioca starch along with 3% texturised soybean protein improved the texture and juiciness of the rehydrated product. Preheating of the minced meat at 70°C for 30 minutes also improved the texture appreciably. It was also found that mixing of the ingredients at low speed (less than 100 rpm) in a dough mixer gave the best texture, higher speed and sharp blades leading to rubbery texture. The dehydrated product (moisture 19-20%) thus prepared had a shelf life of six months at ambient temperature.
    Description: Paper presented at the National Symposium on Aquacrops, 16-18 November 1994, Versova, Bombay (India)
    Keywords: Fisheries ; minced fish meat ; fish cubes ; dried fish cakes ; rehydration process ; processing fishery products ; India
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    Format: 127-131
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    Present status of the Himalayan mahseer Tor putitora, an endangered species in Nainital lakes of Uttar Pradesh (2021)
    In:  http://aquaticcommons.org/id/eprint/16545 | 12051 | 2015-04-03 07:23:39 | 16545 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-06
    Description: The present status of the Himalayan mahseer in the three lakes of Nainital district of Uttar Pradesh is discussed based on the catch data from 1983-84 to 1992-93. Yield of mahseer have shown a gradual decline in the recent years. Besides catch statistics, market arrivals and availability of fish to anglers have also shown a marked decline. Tor putitora is being considered as an endangered fish. It is therefore necessary to repopulate the lakes with the mahseer by adopting better management practices like stocking the lakes continually with sufficient mahseer fingerlings and enforce strict conservation measures to stop killing of juveniles.
    Description: Paper presented at the National Symposium on Aquacrops, 16-18 November 1994, Versova, Bombay (India)
    Keywords: Fisheries ; Tor putitora ; Himalayan mahseers ; rare species ; catch statistics ; fingerlings ; freshwater fish ; Nainital ; Uttar Pradesh ; India
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    Mortality estimates of Indian ribbon fish Trichiurus lepturus off Maharashtra coast (2021)
    In:  http://aquaticcommons.org/id/eprint/16569 | 12051 | 2015-04-08 18:56:24 | 16569 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-06
    Description: In view of its new found status in export market, ribbon fish resources need to be continually monitored. Mortality, one of the important parameter is reported for the Indian ribbon fish Trichiurus lepturus Linnaeus in the present communication. The average annual instantaneous rate of total (Z), natural (M) and fishing mortality coefficient (F) were estimated as 2.66, 0.77 and 1.89 respectively for the 1995 to 1997 period. The exploitation rate (U) and exploitation ratio (E) were estimated as 0.66 and 0.71 respectively, which is beyond the optimum thrust reduction in the fishing effort for this stock along the Maharashtra coast is necessary.
    Keywords: Fisheries ; fishing mortality ; exploitation rate ; Trichiunus lepturus ; ribbon fishes ; Maharashtra ; India
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    Effect of Lates calcarifer seed stocking on the survival and production of Indian major carps reared in a freshwater coastal pond in Konkan region (2021)
    In:  http://aquaticcommons.org/id/eprint/16574 | 12051 | 2015-04-08 18:55:26 | 16574 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-06
    Description: The experiment indicated feasibility of culturing Indian major carps seed with Lates calcarifer, if the size of Indian major carps is larger. In the present investigation the average growths of Catla catla, Labeo rohita and Cirrhinus mrigala are recorded as 1193, 1120 and 821 g, respectively, during the year 1997-98, 1998-99 and 1999-2000 in 7.5 months. Complete harvesting of L. calcarifer is essential before stocking of new seed. The average growth of L. calcarifer was recorded as about 670 g during the above period. About 5000 numbers of Indian major carps fry per hectare can be stocked under the present culture system
    Keywords: Aquaculture ; Lates calcarifer ; feeding habits ; survival rate ; growth rate ; freshwater aquaculture ; polyculture ; India
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    Format: application/pdf
    Format: 73-78
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    Vertical distribution of molluscs in the intertidal area in and around Mumbai, India (2021)
    In:  http://aquaticcommons.org/id/eprint/16577 | 12051 | 2015-04-08 18:54:32 | 16577 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-07
    Description: Vertical distribution of intertidal molluscs in and around Mumbai had been studied. Each species has an upper and lower limit of distribution along the vertical intertidal gradient and are concentrated at particular levels or zones where they find optimum living conditions. Zonation of the intertidal area with reference to molluscs at rocky shores of TIFR, Bandstand and NCPA has similarities. However, there is no similarity in zonation among rocky, sandy and muddy shores. Rocky intertidal zones are more diverse and dense in terms of molluscs. The mid and lower littoral zones have rich diversity. The upper littoral zone at some sites, especially Girgaon chowpatty is totally devoid of molluscs due to anthropogenic activities. Gafrarium divaricatum, Nerita oryzarum, N. polita and Neritina crepidularia have established themselves in all three marked zones, indicating their power to adjust with the wide fluctuations in surrounding environmental conditions.
    Keywords: Ecology ; molluscs ; Gafrarium divaricatum ; Nerita oryzarum ; Nerita polita ; Neritina crepidularia ; intertidal zones ; zonation ; pollution ; dominance ; Mumbai ; Maharashtra ; India
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    Format: application/pdf
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    Stock assessment and biology of Johnius glaucus (Day) off the northwest coast of India (2021)
    In:  http://aquaticcommons.org/id/eprint/16516 | 12051 | 2015-04-03 06:52:17 | 16516 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-06
    Description: The stock size and biology of Johnius glaucus (Day) resource off the northwest coast of India were studied for 1982-83 and 1983-84. The total length at the end of 6, 12, 18, 24 and 26 months was 121 mm, 183 mm, 237 mm, 261 mm and 264 mm respectively. The length growth parameters were: L∞=300 mm, K=0.0807 (monthly) and t(sub)0=-0.51 month. The weight growth parameters were: W∞= 317g, K=0.0762 (monthly) and t(sub)0= -0.41 month. The exploited stock mainly composed of 1/2 + and 1+ age groups. The annual Z, M and F were 2.34, 1.49 and 0.85 respectively. The l(sub)b, t(sub)b, l(sub)r, t(sub)r and selection factor K were 155 mm, 0.75 year, 65 mm, 0.25 year and 3.875 respectively. The Yw/R was optimum at the exploitation rate (E) of 0.75 and coded mesh size of 37 mm. The total stock for 1982-83 and 1983-84 was 14,624 and 26,190 tons respectively. The standing stock of 1982-83 and 1983-84 was 5,645 and 10,110 tons respectively. The MSY for 1982-83 and 1983-84 was 6,623 and 11,788 tons respectively. The F and Z were lowest in 0+ age group and highest in 1+ age group.
    Description: Paper presented at the National Symposium on Aquacrops, 16-18 November 1994, Versova, Bombay (India)
    Keywords: Fisheries ; stock assessment ; population dynamics ; Johnius glaucus ; sciaenids ; India
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    Population dynamics and stock assessment of the spider prawn, Nematopalaemon tenuipes Henderson along the Maharashtra coast (2021)
    In:  http://aquaticcommons.org/id/eprint/16515 | 12051 | 2015-04-03 06:51:16 | 16515 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-06
    Description: Nematopalaemon tenuipes is an important component of non-penaeid prawn resources of the northwest coast of India. During 1979-82 period, it contributed 29.9% to the non-penaeid prawn and 5.6% to the total fish landings of Maharashtra. The von Bertalanffy growth parameter L∞, K and t(sub)0 were 77.38 mm, 1.31 and -0.02 year for the males while for the females these parameters were respectively 87.23 mm, 1.30 and -0.01 year. The natural mortality coefficient (M) was 3.54 and 3.52 and the average total mortality coefficient (Z) during the period was 9.09 and 7.79 for the males and females respectively. With the exploitation rates of 0.61 and 0.55 for the males and females during the period, the total stock of the species was 26,270 tonnes and the standing stock was 3,418 tonnes. The maximum sustainable yield (MSY) of the species under the prevailing fishing conditions was 15,744 tonnes which is close to the average yield of 14,726 tonnes from the nets. Hence further increase in effort is not suggested.
    Description: Paper presented at the National Symposium on Aquacrops, 16-18 November 1994, Versova, Bombay (India)
    Keywords: Fisheries ; population dynamics ; stock assessment ; spider prawns ; Nematopalaemon tenuipes ; Maharashtra ; India
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    Macrobenthos off Mahim (Bombay), west coast of India in relation to coastal pollution and aquaculture (2021)
    In:  http://aquaticcommons.org/id/eprint/16519 | 12051 | 2015-04-03 06:59:52 | 16519 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-06
    Description: Deterioration of water quality clearly indicated a moderate to severe coastal pollution around Mahim whereas a relatively healthy marine environment towards offshore was noticed. Foraminifera, polychaetes, crustaceans and pelecypods were the dominant macro faunal groups encountered in the area. The occasional inhabitants like pennatularians, nemertines, sipunculids, ophiuroids and fish larvae were mostly restricted to offshore regions. Biomass and population density of macro fauna were moderate and showed fluctuating trend. Similarity coefficients of foraminifera (0.89) and polychaetes (0.81) were high for offshore unpolluted stations (3 and 4) as compared to near shore coastal stations (1 and 2). Faunal diversity was relatively more in unpolluted zone. The diversity index (H) was more at station 3 for polychaetes (1.39) and at station 4 for foraminifers (0.54). In general, biomass was high during post monsoon excepting station 1 which was invariably under severe pollution stress throughout the study period. Foraminifera were abundant at sandy bottom while polychaetes preferred muddy (clayey silt) bottom. A noticeable ecological modification associated with faunal abundance and diversity were related to deteriorating marine water quality due to anthropogenic waste disposals. The prevailing water quality around Mahim is unsuitable for any kind of culture practices and also for harvesting economically important marine species.
    Description: Paper presented at the National Symposium on Aquacrops, 16-18 November 1994, Versova, Bombay (India)
    Keywords: Pollution ; stock assessment ; aquatic pollution ; pollution effects ; macrofauna ; faunal diversity ; foraminifera ; polychaetes ; crustaceans ; pelecypods ; Mahim ; Bombay ; Maharashtra ; India
    Repository Name: AquaDocs
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    Social status and problems of fishing community at Allahabad (2021)
    In:  http://aquaticcommons.org/id/eprint/16523 | 12051 | 2015-04-03 07:05:59 | 16523 | Indian Fisheries Association
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    Publication Date: 2021-07-06
    Description: The paper highlights social status and socio-economic problems of fishermen living along the Ganga and the Yamuna at Allahabad. Since the problems of fishermen varied with respect to category (with owned boat and with hired boat) and location, significance of this variation was tested by x²-test. The paper further emphasises on an intensive study of fishermen community to have in depth analysis of their problems and to suggest remedial measures for their upliftment.
    Description: Paper presented at the National Symposium on Aquacrops, 16-18 November 1994, Versova, Bombay (India)
    Keywords: Fisheries ; Sociology ; fishermen communities ; fishing communities ; local communities ; sociological aspects ; socio-economic problems ; Gange River ; Yamuna River ; Allahabad ; Uttar Pradesh ; India
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    Aquacrops of Darbhanga District in north Bihar and their commercial significance (2021)
    In:  http://aquaticcommons.org/id/eprint/16526 | 12051 | 2015-04-03 07:08:46 | 16526 | Indian Fisheries Association
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    Publication Date: 2021-07-06
    Description: Darbhanga district in North Bihar is characterised by thick alluvial soil, moderately good rainfall, high humidity, ample sunshine and numerous water resources in the form of perennial rivers, tributaries, streams, lakes, ponds, pools and puddles. The aquacrops of this district include several species of commercially important fishes, aquatic cash crops such as makhana (Euryale ferox), singhara (Trapa spp.), lotus, lilly, Khubi etc. and molluscs. This paper highlights the commercial significance of these aquacrops and offers suggestions for their sustained development.
    Description: Paper presented at the National Symposium on Aquacrops, 16-18 November 1994, Versova, Bombay (India)
    Keywords: Aquaculture ; freshwater fishes ; commercial species ; integrated aquaculture systems ; aquaculture enterprises ; aquatic plants ; seeds ; Darbhanga ; Bihar ; India
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    Stock assessment of sin croaker Johnieops sina (Cuvier) from Bombay waters (2021)
    In:  http://aquaticcommons.org/id/eprint/16532 | 12051 | 2015-04-03 07:15:01 | 16532 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-06
    Description: Growth, mortality and stock parameters of Johnieops sina (Cuvier) based on the data collected from 1989 to 1994 from Sassoon Dock and New Ferry Wharf landing centres of Greater Bombay has been discussed here. The von Bertallanffy's growth parameters for this species were estimated as follows, L∞= 266 mm, K=0.91 per year and W∞=193 g. This species grows to 159 and 223 mm at the end of first and second year of its life. The mortality parameters estimated were Z=6.17, M=2. 03 and F=4.14. The E and U were calculated as 0.62 and 0.63 respectively. Length cohort and Thompson Bell analyses show that there is no decline in the catches at the present level of fishing. But even by doubling the efforts the catches can go up by only 9.4 % indicating that the fishing efforts is not economical and proportional to the increase in yield.
    Description: Paper presented at the National Symposium on Aquacrops, 16-18 November 1994, Versova, Bombay (India)
    Keywords: Fisheries ; Johnieops sina ; sin croaker ; stock assessment ; Bombay ; Maharashtra ; India
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    Use of dopamine antagonists on induced spawning of Indian major carps (2021)
    In:  http://aquaticcommons.org/id/eprint/16540 | 12051 | 2015-04-03 07:21:03 | 16540 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-06
    Description: To test the efficacy of the technique of using dopamine-antagonists with pituitary extracts, experiments were conducted in July/August '93, at the CIFE Fresh water Fish Farm, Powerkheda. In all, 35 sets (1 female x 2 male in each set) were tried individually. 19 sets were treated with Domperidone (DOM) and Carp Pituitary Extract (CPE) and they constituted the experimental sets, while the rest 16 were treated with CPE and formed the control sets. The breeding, complete ovulation and hatching was 84.2%, 87.5% and 85.7%, respectively in the experimental sets whereas it was 93.7%, 60% and 72.7%, respectively in case of control sets. Experimental sets yielded 1.20 lakh spawn/kg body wt. (female) as compared to 0.83 lakh spawn kg body wt. (female) received from control sets on average basis. When DOM was used at 50-60% there was 100% breeding success but when increased to 70%, breeding rate fell to 66%. In mass breeding of Catla in the circular hatchery DOM mixed with CPE in 50:50 ratio gave excellent results.
    Description: Paper presented at the National Symposium on Aquacrops, 16-18 November 1994, Versova, Bombay (India)
    Keywords: Aquaculture ; Indian major carps ; spawning ; ovulation ; induced breeding ; experiments ; Domperidone ; Carp Pituitary Extract ; aquaculture techniques ; India
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    Prospects of integration of aquaculture with animal husbandry and land crop culture in Tripura State (2021)
    In:  http://aquaticcommons.org/id/eprint/16537 | 12051 | 2015-04-03 07:19:00 | 16537 | Indian Fisheries Association
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    Publication Date: 2021-07-06
    Description: Tripura is a densely populated small state with meagre water resources. 47.51% of the population is constituted by socio-economically backward, illiterate, orthodox, tribal and scheduled castes. Some of them are nomad and a majority of the rest of the population is refugees from Bangladesh, but almost 100% is fish eater. Settlement of tribes in villages, provision of nutritious food and employment therefore calls for proper utilization of every resource they have. The State is poor in water resources but recently has created 21,636.23 ha of new water area. Tripura is rich in pig population, besides poultry birds. Paddy is the main crop cultivated in arable lands. An integration of livestock raising and land based agriculture with pisciculture practices around mini barrages will help in solving the problems to a great extent. The paper is an attempt to outline the prospects of integration of aquaculture with animal husbandry and land based crop culture in Tripura State.
    Description: Paper presented at the National Symposium on Aquacrops, 16-18 November 1994, Versova, Bombay (India)
    Keywords: Aquaculture ; polyculture ; integrated farming systems ; animal husbandry ; crop culture ; Tripura ; India
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    Effect of chloral hydrate on metabolic rate of Labeo rohita (Ham) and Poecilia reticulata (Peters) (2021)
    In:  http://aquaticcommons.org/id/eprint/16548 | 12051 | 2015-04-03 07:25:41 | 16548 | Indian Fisheries Association
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    Publication Date: 2021-07-06
    Description: Comparative impact of chloral hydrate anaesthesia on the metabolic rate of Indian major carp Labeo rohita and larvivorous fish Poecilia reticulata was assessed. Observation on the Oxygen Consumption Rate (OCR) revealed that in common guppies OCR was substantially low (1.105 and 1.097 mg/g/hr) at 0.1 and 0.25 g/l concentrations of chloral hydrate as against OCR of 1.487 mg/g/hr in the control. Fry of L. rohita in group showed lower metabolic rates in the control as well as treated conditions as compared to the individuals of this fish. This may be due to sympathetic psychophysiological reflex of grouped fish. Higher dose of chloral hydrate (0.25 g/l) also caused higher OCR probably due to distress. Application of chloral hydrate also favoured lesser release of metabolic wastes (ammonia and carbon dioxide). There was significant positive correlation between time and oxygen consumption, whereas, for time and OCR this relationship was negative. Regression of chloral hydrate doses for OCR and time has also been calculated.
    Description: Paper presented at the National Symposium on Aquacrops, 16-18 November 1994, Versova, Bombay (India)
    Keywords: Fisheries ; Labeo rohita ; Poecilia reticulata ; oxygen consumption rate ; chloral hydrate ; metabolic rate ; India
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  • 41
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    Some aspects of the biology of Otolithes cuvieri (Trewavas) and Johnius glaucus (Day) from Veraval (2021)
    In:  http://aquaticcommons.org/id/eprint/16557 | 12051 | 2015-04-08 19:00:58 | 16557 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-06
    Description: The length-weight relationship in O. cuvieri and J. glaucus can be described by the equations log W=-5.27997+3.13225 log L and log W=-4.93431+3.02556 log L respectively. The length at first maturity in O. cuvieri is estimated as 256 mm and in J. glaucus as 180 mm. Empty stomachs occurred in high percentage in both the species. A study on composition of food items revealed that O. cuvieri feeds on a variety of organisms while J. glaucus a selective feeder.
    Keywords: Biology ; length-weight relationship ; feeding habits ; maturation ; Veraval ; Gujarat ; India
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    Population dynamics of penaeid prawn Penaeus merguiensis off Mumbai coast (2021)
    In:  http://aquaticcommons.org/id/eprint/16564 | 12051 | 2015-04-08 18:58:10 | 16564 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-06
    Description: Stock dynamics of Penaeus merguiensis was studied using length composition data collected separately for males and females during the period 1995-1998, at New Ferry Warf landing, centre in Greater Mumbai. Food and feeding, sex ratio, fecundity and length-weight relationships were worked out on a representative sub-sample. Asymptotic length (Loo) and growth coefficient (K) were estimated to be 220 mm and 1.80 per annum respectively for males. These parameters were respectively 281 mm and 1. 72 per annum in the case of females. The instantaneous rate of total mortality coefficient (Z) was found to be 9.79 and 7.44 per annum for males and females respectively. The annual natural mortality coefficient (M) was estimated to be 2.80 for males and 2.60 for females. As the exploitation ratio exceeded 0.5 in the case of both the males and females, the study suggests the necessity for reduction in fishing pressure in order to achieve Maximum Sustainable Yield (MSY).
    Keywords: Fisheries ; Penaeus merguiensis ; banana shrimps ; mortality ; population dynamic ; stock assessment ; maximum sustainable yield ; Mumbai ; Maharashtra ; India
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    Comparative account of growth rate of body parts with total length in adult Puntius sarana (Ham.) (2021)
    In:  http://aquaticcommons.org/id/eprint/16570 | 12051 | 2015-04-08 18:56:11 | 16570 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-06
    Description: The present study on growth rate of different body parts in relation to total length, in the male and female Puntius sarana (Ham.) did not show any significant heterogeneity except in snout length (p.01). The growth rate of snout length was found to be higher in females (b=0.0377) than in males (b=0.0266). Since the growth rate of most of the body parts was found to be homogeneous in both the sexes, the common regression co-efficient "b" was calculated on pooled data to represent the growth rate of different body parts against total length, the linearity of regression lines indicated isometric growth.
    Keywords: Fisheries ; Puntius sarana ; growth rate ; morphometry ; teleostei ; freshwater fishes ; India
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    Study on the morphometric and meristic characteristics of splendid silver belly Leiognathus splendens (Cuvier) from Bombay coast (2021)
    In:  http://aquaticcommons.org/id/eprint/16571 | 12051 | 2015-04-08 18:55:57 | 16571 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-06
    Description: Ten morphometric and six meristic characters of Leiognathus splendens (Cuvier) of Bombay Coast have been studied sexwise. Regression and sexwise difference if any between the compared morphometric characteristics have been worked out. Range, mode, standard deviation, co-efficient of variation of 6 meristic characters have been analysed. There was no significant difference between the sexes in morphometric and any deviation in the meristic characters.
    Keywords: Biology ; ponny fish ; silver bellies ; Leiognathus splendens ; morphometry ; coastal waters ; Bombay ; Maharashtra ; India
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  • 45
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    Estimation of fishing mortality and migration coefficient of the fishery of juvenile Macrobrachium rosenbergii from Kalu River in Maharashtra (2021)
    In:  http://aquaticcommons.org/id/eprint/16562 | 12051 | 2015-04-08 18:58:39 | 16562 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-06
    Description: The freshwater prawn, Macrobrachium rosenbergii breeds in estuaries and the juveniles after completion of their larval stage start their upward migration towards rivers. It is at this stage fishing of juveniles takes place in river mouths. Kalu River near Titwala, in Maharashtra is estimated based on data presented by Indulkar and Shirgur (1995) for 1991 and 1992 fishing seasons. The fishing mortality was estimated to be 1.50 and 1.28 for a fishing season of 3 months in 1991 and 1992 respectively, while the migration coefficient was computed to be 3.53 during the fishing season. As the average exploitation rate during the study period was only 0.24, the juveniles are not heavily fished and there is a scope for almost doubling the present catch to about 4 million seeds per fishing season.
    Keywords: Fisheries ; Macrobrachium rosenbergii ; fishing mortality ; migration coefficient ; explotation rate ; Kalu River ; Maharashtra ; India
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    Studies on the performance of Ovatide on breeding of Indian major carps (2021)
    In:  http://aquaticcommons.org/id/eprint/16581 | 12051 | 2015-04-08 18:53:43 | 16581 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-07
    Description: The paper deals with the experimental studies on breeding of Indian Major Carps - Catla catla (Valenciennes), Labeo rohita (Hamilton), Cirrhinus mrigala (Hamilton), & Labeo calbasu (Hamilton) with the help of 'Ovatide' which is being used as an alternative inducing agent for commercial seed production. This study has been conducted for six consecutive months (April - September, 2000) in a stone-pitched breeding channels of a farm located at Midnapore District, West Bengal. The doses of 'Ovatide' (0.5 ml/kg of fish weight) remained same for each female species during the entire study period and males were released without any dose. The physicochemical parameters of water during different months were estimated. The latency period and fertilization percentage varied in different months and species. The results confirmed that 'Ovatide' can be used successfully in a much more cost-effective way for induced breeding of carps, even in rural fish farms with morrum-pitched breeding channels.
    Keywords: Aquaculture ; Indian major carps ; Catla catla ; Labeo rohita ; Cirrhinus mrigala ; Labeo calbasu ; breeding ; inducing agents ; ovatide ; rural fish farms ; India
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    Length-weight relationship of intertidal molluscs from Mumbai, India (2021)
    In:  http://aquaticcommons.org/id/eprint/16591 | 12051 | 2015-04-08 18:51:22 | 16591 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-07
    Description: A study on the length-weight relationship of common intertidal molluscs from Mumbai showed a high degree of correlation between their length and weight. Most of the molluscs exhibited isometric growth pattern but in some species, allometric growth was found, which is attributed to maturity, nonlinear growth of shell and the ecological conditions. The variations in the growth rate of Gafriarium divaricatum sampled from two geographically separate sites, Bandstand and NCPA, is a result of variation in ecological conditions.
    Keywords: Biology ; Gafrarium divaricatum ; molluscs ; length-weight relationship ; growth rate ; growth rate ; Mumbai ; Maharashtra ; India
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    Bacterial quality and depuration of the green mussel Perna viridis from natural beds (2021)
    In:  http://aquaticcommons.org/id/eprint/16593 | 12051 | 2015-04-08 18:51:04 | 16593 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-07
    Description: Green mussel (Perna viridis) and sea water from their natural beds on the coastal areas of Porto Novo were studied between April and August 1996 for their bacterial quality. Water samples from the beds were also analysed for their physico-chemical parameters. The total bacterial count of mussels from natural beds as well as bed waters ranged 10³ organisms per gram of mussel meat suspension and per milliliter of sea water. The faecal coliforms were found to be within the permissible limits. Pathogenic bacteria such as Salmonella spp., Streptococcus spp. and Staphylococcus spp. were absent. The variations in pH, temperature, salinity and dissolved oxygen of the seawater samples were insignificant. The mussels were subjected to depuration by different methods among which chlorination was found to be most effective.
    Keywords: Biology ; green mussels ; Perna viridis ; bacterial quality ; depuration ; Porto Novo ; Mumbai ; Maharashtra ; India
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    Ecophysiological response of Nerita oryzarum (Recluz), a gastropod, to variations in temperature, pH and salinity (2021)
    In:  http://aquaticcommons.org/id/eprint/16590 | 12051 | 2015-04-08 18:51:39 | 16590 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-07
    Description: During ecophysiological investigations on an intertidal gastropod, Nerita oryzarum (Recluz), of Mumbai shore, various biochemical changes could be recorded. Glycogen and lipid contents of N. oryzarum were found to decrease, whereas, water content increased with decreasing salinity. The rate of oxygen consumption declined with the decrease in salinity and also in highly acidic (pH 2) as well as highly alkaline (pH 10) sea water. The observed variations in the rate of oxygen consumption and changes in biochemical composition in the animal with changes in salinity, pH and temperature are probably the process of physiological and biochemical adjustments to the fluctuating environmental conditions in the intertidal region.
    Keywords: Biology ; Nerita oryzarum ; gastropods ; ecophysiology ; oxygen consumption ; Mumbai ; Maharashtra ; India
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    Study of disparate sectors in fisheries (2021)
    In:  http://aquaticcommons.org/id/eprint/16580 | 12051 | 2015-04-08 18:53:52 | 16580 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-07
    Description: Fisheries employ a number of people and fisheries industry is truly an amalgamation of various disparate sectors. Fisheries play an important role in Indian economy and it provides employment to a number of people. For planning of integrated development of fisheries industry and resource management, a considerable amount of information is required. In this paper a study of the disparate sectors with regards to the nature of work, number of workers, sex-wise participation, earning type and earning in Indian Rupees in the year 1991-92, 1992-93, 1993-94 and 1999-2000 has been done in a selected fishing village. The geographical locale where the study has been done is Versova fishing village which is a major fish landing centre in Mumbai. The study has revealed that there are a number of disparate sectors in fisheries and in this fishing village on an average, a boat owner provided employment to 30-60 people in the year 1994 and to 19-25 people in 1999. Though this number has shown a decreasing trend with the advancement of years, it is however, seen that a number of people are employed in various disparate sectors in fisheries. It is necessary to highlight this and in any developmental planning, all these sectors should be given equal importance.
    Keywords: Fisheries ; fishery economics ; fisheries ; fishery industries ; employment ; India
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    A note on application of hills procedure for growth-curve analysis of Indian major carp, Labeo rohita (Ham.), during the gonodal development period at Shillong, Meghalaya (2021)
    In:  http://aquaticcommons.org/id/eprint/16597 | 12051 | 2015-04-08 18:49:34 | 16597 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-07
    Description: The present study deals with the length increment data of 15 adult Labeo rohita (Ham.) over a period of five months by the applicatin of finite difference method at an altitude of 1496 m above mean sea level at Shilllong, Meghalaya.
    Keywords: Aquaculture ; mean sea level ; growth curves ; length ; finite difference method ; gonads ; freshwater fish ; Labeo rohita ; Indian major carps ; Shillong ; Meghalaya ; India
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    Semi-intensive shrimp farming system of Kerala, India: a production function analysis (2021)
    In:  http://aquaticcommons.org/id/eprint/16588 | 12051 | 2015-04-08 18:52:07 | 16588 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-07
    Description: An analysis of the factor-product relationship in the semi-intensive shrimp farming system of Kerala, farm basis and hectare basis, we are attempted and the results reported in this paper. The Cobb-Douglas model, in which the physical relationship between input and output is estimated, and the marginal analysis then employed to evaluate the producer behaviour, was used for the analysis. The study was based on empirical data collected during November 1994 to May 1996, covering three seasons, from 21 farms spread over Alappuzha, Ernakulam and Kasaragod districts of the state. The sample covered a total area of 61.06 ha. Of the 11 explanatory variables considered in the model, the size of the farm, casual labour and chemical fertilizers were found statistically significant. It was also observed that the factors such as age of pond, experience of the farmer, feed, miscellaneous costs, number of seed stocked and skilled labour contributed positively to the output. The estimated industry production function exhibited unitary economies of scale. The estimated mean output was 3937 kg/ha. The test of multi-co-linearity showed that there is no problem of dominant variable. On the basis of the marginal product and the given input-output prices, the optimum amounts of seed, feed and casual labour were estimated. They were about 97139 seed, 959 kg of feed and 585 man-days of casual labour per farm. This indicated the need for reducing the stocking density and amount of feed from the present levels, in order to maximise profit. Based on the finding of the study, suggestions for improving the industry production function are proposed.
    Keywords: Aquaculture ; shrimp aquaculture ; shrimp farming ; semi-intensive farming systems ; Cobb-Douglas model ; productivity evaluation ; production function ; Alappuzha ; Ernakulam ; Kasaragod ; Kerala ; India
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    Socio-economic dimension of fish farming in Assam (2021)
    In:  http://aquaticcommons.org/id/eprint/16596 | 12051 | 2015-04-08 18:50:11 | 16596 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-07
    Description: Information on socio-economic framework of the fish farmer community forms a benchmark for policy formulation to develop this economically backward sector. Very few studies have been conducted on the socio-economic aspect of fish farming. Two districts of Assam, Darrang and Nagaon, were selected for this study where 120 respondents from each district were selected randomly. The characteristics representing the personnel and socio-economic attributes of the fish farmers are presented in this paper. The socio-economic status of fish farmers has to be improved by bringing the modern concepts of fish farming to the doorstep of farmers.
    Keywords: Aquaculture ; fish farming ; socio-economic frameworks ; Darrang ; Nagaon ; Assam ; India
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    A comparative study on the hatching of common carp eggs in hapa and hatchery (model CIFE D-80) (2021)
    In:  http://aquaticcommons.org/id/eprint/15850 | 12051 | 2014-12-31 08:24:06 | 15850 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-10
    Description: Common carp (Cyprinus carpio) eggs were incubated to study the efficiency of hatching in hapa and hatchery. During incubation the recorded temperature was 21-28 degree C and 20-31 degree C, dissolved oxygen 6-9 ppm. and 3-5 ppm., total alkalinity 180-250 ppm. and 28-62 ppm. respectively in the hatchery (model C.I.F.E. D-80) and hapa. CO sub(2) was totally absent in the hatchery, but recorded 3-10 ppm. in the hapa. The flow of water was maintained at 1.25 l/minute/jar in the hatchery. Under the above environmental conditions the eggs hatched in 42-51 hrs. in the hatchery and 61-81 hrs. in the hapa from egg to spawn thereby establishing the hatchery to be a better hatching system for carp eggs.
    Keywords: Aquaculture ; hatcheries ; environmental conditions ; hatching ; aquaculture systems ; fish eggs ; Cyprinus carpio ; freshwater ; India
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    Sex ratio of the false trevaly Lactarius lactarius (Bloch and Schneider) (2021)
    In:  http://aquaticcommons.org/id/eprint/15866 | 12051 | 2014-12-31 08:53:19 | 15866 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-10
    Description: The sex ratio in Lactarius lactarius at different months and years was studied. Sex ratio data show that males outnumber females in all months except in October. The insignificant difference in the number of individuals of both the sexes during spawning months (January, March, October and November) indicated that males and females congregate during the spawning season. Among the larger specimens, males constituted the minority.
    Keywords: Biology ; sex ratio ; Lactarius lactarius ; marine ; India
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    Zooplankton biomass along the west coast of India and its effect on the fishery (2021)
    In:  http://aquaticcommons.org/id/eprint/15865 | 12051 | 2014-12-31 08:37:42 | 15865 | Indian Fisheries Association
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    Publication Date: 2021-07-10
    Description: The coastal zone along the west coast of India is very productive with a mean secondary production rate of 5.89 mg C/m super(3)/day. Statewise, maximum zooplankton standing stock was observed off Maharashtra. The existing yield of fishery from the surveyed region has been compared with the estimated sustainable fishery potential.
    Keywords: Biology ; Fisheries ; secondary production ; marine fisheries ; potential yield ; marine ; Kerala ; Karnataka ; Goa ; Maharashtra ; India
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    Acclimatization of juveniles of marine prawn Penaeus monodon to fresh water (2021)
    In:  http://aquaticcommons.org/id/eprint/15867 | 12051 | 2014-12-31 08:39:01 | 15867 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-10
    Description: Penaeus monodon, hitherto cultured in brackishwater, has been acclimatized to fresh water for culturing in fresh water system. One hundred juveniles of P. monodon measuring in an average 27.7 mm were procured from the coastal lowlying areas near Kakinada in Andhra Pradesh and were used to conduct an experiment on acclimatization. High percentage of survival (96.0%) was observed when the water salinity was lowered gradually at the rate of 10% per day for the first 2 days, 5% per day during the next 2 days and later at the rate of 1% per day.
    Keywords: Aquaculture ; Biology ; brackishwater aquaculture ; acclimation ; fresh water ; survival ; Penaeus monodon ; marine ; freshwater ; Kalinada ; Andhra Pradesh ; India
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    Condition factor and length-weight relationship of Nemipterus japonicus (Bloch) off Bombay coast (2021)
    In:  http://aquaticcommons.org/id/eprint/15870 | 12051 | 2014-12-31 08:44:10 | 15870 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-10
    Description: Fluctuations in the K values of Nemipterus japonicus (Bloch) off Bombay coast were interpreted regarding sex, month and females maturity stage. These indicate differential growth rates in males and females. Males and females attain first maturity at 145 mm and 115 mm respectively, second maturity is attained by both the sexes at 195 mm. First spawning occurs when both are of 155 mm length and at second spawning males and females attain 215 and 205 mm of length respectively. The fish mature and breed at "O" year; the main spawning period is from August to November with peak spawning activities in October. It grows about 155 mm in first year at 12.91mm per month and about 215 mm in the second year at 5.0 mm per month on an average. Length-weight relationships for males and females are given. The rate of growth of females by weight was found to be slower below 150 mm, but faster than that of males above 150 mm specimens.
    Keywords: Biology ; length-weight relationships ; age at recruitment ; condition factor ; Nemipterus japonicus ; marine ; Bombay ; Maharashtra ; India
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    Morphometric study and length-weight relationship of Therapon jarbua, Forsskal (2021)
    In:  http://aquaticcommons.org/id/eprint/15882 | 12051 | 2014-12-31 13:12:28 | 15882 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-11
    Description: The different morphometric characters of Therapon jarbua showed a linear relationship and uniformity in the various biometric measurements whereas the length-weight relationship showed a curvilinear graph. The studies also indicate that there is no significant difference, in the morphometric characters and length-weight relationship between the males and females. Ponderal index values for males and females was found to fluctuate between 1.3 to 1.5 for most of their life times with the peaks and crests appearing at different lengths for males and females.
    Keywords: Biology ; condition factor ; meristic counts ; Therapon jarbua ; marine ; Bombay ; Maharashtra ; India
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    Traditional fishing methods of Lakshadweep (2021)
    In:  http://aquaticcommons.org/id/eprint/15885 | 12051 | 2014-12-31 13:17:37 | 15885 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-11
    Description: Economy of the Lakshadweep islanders depends mainly on coconut farming and fishing. About 30-40% of the population are full time fishermen. Some of the fishing methods practised by the islanders are still traditional, Tuna forms the main established fishery of the island. Pole and line fishing is the most effective fishing method for surface tuna shoals. Most of the traditional fishing operations prevailing in the islands are unique and conducted during neap tides only.
    Keywords: Fisheries ; catching methods ; artisanal fishing ; marine ; Lakshadweep ; India
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    On the water quality of selected environments along Bombay coast (2021)
    In:  http://aquaticcommons.org/id/eprint/15889 | 12051 | 2014-12-31 13:23:11 | 15889 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-11
    Description: Water quality of three stations representing polluted (Sts. B & S) and relatively unpolluted (St. M) areas along the coast of Bombay was studied during Mar 1981 to May 1982. Stations B & S were characterized by relatively wider fluctuations in salinity, low range of dissolved oxygen and higher BOD, phosphate and nitrate levels. At St. M higher range of dissolved oxygen coupled with low values of BOD and nutrients suggest the prevailing good water quality. The deteriorating water quality of the polluted station probably lead to retarded growth of Saccostrea cucullata and Cerithium rubus living in the shallow intertidal region.
    Keywords: Pollution ; water quality ; pollution monitoring ; biochemical oxygen demand ; coastal waters ; pollution effects ; Saccostrea cucullata ; marine ; Bombay ; Maharashtra ; India
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    Human chorionic gonadotrophin: a substitute for pituitary gland for induced breeding (2021)
    In:  http://aquaticcommons.org/id/eprint/15892 | 12051 | 2015-01-01 09:16:53 | 15892 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-11
    Description: Pituitary extract is in use for fish breeding since a long. Due to the difficulties in procuring pituitary glands and its preservation, scientists were looking for its substitute. Results on the use of human chorionic gonadotrophin in combination with pituitary for breeding of Cirrhina mrigala and Labeo rohita were encouraging. It has been possible to breed C. mrigala and L. rohita by use of HCG also. An increase in hatching percentage was observed with HCG & PG mixture in modern carp hatchery CIFE D-81.
    Keywords: Aquaculture ; induced breeding ; aquaculture techniques ; hormones ; Labeo rohita ; Cirrhinus mrigala ; freshwater ; fish breeding ; India
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    Maturity and spawning of Otolithus argenteus (Cuvier) from Karwar waters (2021)
    In:  http://aquaticcommons.org/id/eprint/15897 | 12051 | 2015-01-01 09:25:00 | 15897 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-11
    Description: The present paper deals in the maturity stages, ova diameter and spawning season, of Otolithus argenteus from Karwar waters. The seven stages of maturity were determined based on the macroscopic appearance and microscopic study of intra ovarian eggs. The average size at first maturity was found to be 160 mm. The diameter of ova varies from 0.01 to 0.82 mm. with various modes, indicating the nature and the frequency of spawning.
    Keywords: Biology ; developmental stages ; spawning ; sexual maturity ; Otolithus argenteus ; marine ; Karwar ; Karnataka ; India
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    A note on mass mortality of fish in Shivpur Talab (Madhya Pradesh) (2021)
    In:  http://aquaticcommons.org/id/eprint/15902 | 12051 | 2015-01-01 09:29:20 | 15902 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-11
    Description: Shivpur Talab is a perennial tank in Hoshangabad district (Madhya Pradesh) having a maximum water spread of 4 ha. It is rainfed and also draws water from a close by Tawa canal. On 21st May 1985 heavy mortality of fish was noticed in the tank. The talab was stocked with fingerlings Catla catla, Cyprinus carpio and Labeo rohita approximately one year before the date of mortality. Scientific investigation revealed that mass mortality of fish occurred due to reduction in water area of the tank which in turn brought out oxygen depletion. The paper deals with the factors which brought about mass mortality of fish in Shivpur Talab.
    Keywords: Aquaculture ; Biology ; water quality ; mortality causes ; fish kill ; Labeo rohita ; Cyprinus carpio ; Catla catla ; freshwater ; Hoshangabad ; Madhya Pradesh ; India
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    Population studies of three species of ribbon fishes off the Bombay coast (2021)
    In:  http://aquaticcommons.org/id/eprint/15901 | 12051 | 2015-01-01 09:28:57 | 15901 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-11
    Description: Populations of three species of ribbonfishes (Trichiurus lepturus, Lepturacanthus savala, Euplerogrammus muticus) off the Bombay coast were studied for meristic and morphometric characters. All meristic characters except pectoral fin ray count, showed interspecific as well as intraspecific variations. Regression studies for various characters showed a linear relationship and high degree of correlation to the total and head lengths. Variations between the sexes were found insignificant. A comparison of the mean ratios of body parts of samples from Bombay and Mandapam showed significant variations for L. savala and E. muticus.
    Keywords: Biology ; Environment ; meristic counts ; Lepturacanthus savala ; Trichiurus lepturus ; marine ; Bombay ; Maharashtra ; India
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    Preliminary observations on the availability of Tor tor (Hamilton) fry in the River Narmada near Hoshangabad, Madhya Pradesh (2021)
    In:  http://aquaticcommons.org/id/eprint/15903 | 12051 | 2015-01-01 09:30:08 | 15903 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-11
    Description: Collection of mahseer (Tor tor) fry during December to January from three centres of the river Narmada near Hoshangabad, (Joshipur ghat, Dungerwada ghat and Kherra ghat) using a special type of fry collection net is described. The physical features and physico-chemical conditions of the collection sites are also dealt with.
    Keywords: Biology ; Environment ; Fisheries ; fry ; seed collection ; Tor tor ; freshwater ; Narmada river ; Hoshangabad ; Madhya Pradesh ; India
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    Morphometric study of Megalaspis cordyla (Linnaeus, 1758) along the northwest coast of India (2021)
    In:  http://aquaticcommons.org/id/eprint/15904 | 12051 | 2015-01-03 09:40:34 | 15904 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-11
    Description: Megalaspis cordyla obtained from the landings in and around Bombay, Maharashtra, India, were analysed for the study of their morphometric and meristic characteristics. The various morphometric and meristic characteristics did not indicate any variation within the population. The data provided are intended to facilitate comparison with similar data for other locations, and thereby, to establish the homogeneity or heterogeneity of the populations in the distributional range of this species.
    Keywords: Biology ; population genetics ; comparative studies ; morphometry ; meristic counts ; megalaspis cordyla ; marine ; Bombay ; Maharashtra ; India
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    Studies on the feeding biology of an airbreathing fish Heteropneustes fossilis (Bloch) (2021)
    In:  http://aquaticcommons.org/id/eprint/15908 | 12051 | 2015-01-03 09:44:51 | 15908 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-11
    Description: The food and feeding habits of an air-breathing fish, Heteropneustes fossilis were studied from an eutrophic lake, Hussainsagar, Hyderabad, (Andhra Pradesh, India), during 1981-1983. The major preferred items of food were insect larvae, insects, ostracods, plant material and gastropods. Due to the mixed feeding habits of both plant and animal matter, this species is considered as an omnivorous feeder. Bryozoans were recorded for the first time in the diet of H. fossilis.
    Keywords: Biology ; diets ; eutrophic lakes ; seasonal variations ; Heteropneustes fossilis ; freshwater ; Hussain Sagar lake ; Andhra Pradesh ; India
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    Length frequency and growth studies on Cynoglossus macrolepidotus (Bleeker) off Bombay coast (2021)
    In:  http://aquaticcommons.org/id/eprint/15910 | 12051 | 2015-01-03 09:46:13 | 15910 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-11
    Description: Specimens randomly collected from Sassoon Docks, Bombay, India, at monthly intervals during 1979 to 1981 were considered for age/growth studies. Cynoglossus macrolepidotus, the fish, attained a length of 202 mm at 1 year, 250 mm at 1 1/2 year and 272 mm at 21 months respectively; the maximum length of the fish could be 353 mm and the life span could be 7 years. The scale ring studies showed presence of only 0 to 3+ rings. Majority of the fishes were of 1 and 1+ year class.
    Keywords: Biology ; length-weight relationships ; age determination ; Cynoglossus macrolepidotus ; marine ; Bombay ; Maharashtra ; India
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    Morphometric studies in Penaeus merguiensis from Ratnagiri waters for selection of the brood stock in genetic improvement programmes (2021)
    In:  http://aquaticcommons.org/id/eprint/15918 | 12051 | 2015-01-16 08:41:01 | 15918 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-11
    Description: Studies on genetic improvement of penaeid prawns for the character higher tail weight using methods of selective breeding were undertaken. Prior to the actual breeding experiments it was necessary to find out the quantum of available variability in the character tail weight amongst the natural populations of Penaeus merguiensis from the Indian waters. Thirteen morphometric variables were measured and various statistical analyses were carried out. The tail weight showed almost double values of coefficient of variation in the females than the males (C.V. 20.37 and 11.08 respectively). The combination of the characters viz. sixth segment length (SSL), sixth segment depth (SSD) and posterior abdominal circumference (PAC) gave the highest R super(2) values. These variables were easy to measure and gave maximum variation in the character tail weight without sacrificing the breeders in the brood stock. The quantitative character tail weight was influenced by both genetic and environmental factors was statistically ascertained by applying 2-Factor analysis.
    Keywords: Aquaculture ; Biology ; genetics ; selective breeding ; shrimp culture ; brood stocks ; marine ; Ratnagiri ; Maharashtra ; India
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    Induced breeding, embryonic and larval development in Heteropneustes fossilis (Bloch) in the agro-climatic conditions of Maharashtra (2021)
    In:  http://aquaticcommons.org/id/eprint/15921 | 12051 | 2015-01-16 08:43:24 | 15921 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-11
    Description: Heteropneustes fossilis was induced bred for the first time in the agro-climatic conditions of Maharashtra, India. The embryonic development was completed within 16-18h after fertilisation. Head and tail ends were distinguishable after 3h and 11-12 somites were visible after 6-7h. The eggs started hatching after 14h of incubation. Average hatching time was 16-18h at 26 degrees C. In first day old pro-larva, notochord was deflected upwards, eyes were darkly pigmented and alimentary canal appeared. In fourth day old post-larva intestinal coiling could be seen and yolk was absorbed. Aerial respiration started by 8th day. The 10 day old post-larva was free swimming and fed voraciously attaining a length of 20 mm in 30 days.
    Keywords: Aquaculture ; embryonic development ; biological development ; Heteropneustes fossilis ; freshwater ; Maharashtra ; India
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    Fish seed production under controlled hatchery system: a cottage industry (2021)
    In:  http://aquaticcommons.org/id/eprint/15920 | 12051 | 2015-01-16 08:42:47 | 15920 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-11
    Description: The fish seed production in recent times has emerged as a cottage industry, with the development of controlled hatchery system. Two units of six buckets of vertical hatchery system i.e. Modern Carp Hatchery CIFE D-81 were installed in a private fish farm. 130.25 lakh spawn of Indian Major Carp (Cyprinidae) was produced during the 1988 season, with an average survival rate of 70%. The results support the viability of technology especially for the economically weaker section.
    Keywords: Aquaculture ; hatcheries ; fish culture ; seed production ; controlled conditions ; Cyprinidae ; freshwater ; Barabanki ; Uttar Pradesh ; India
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    Preservation of Otolithus argenteus at low temperature (2021)
    In:  http://aquaticcommons.org/id/eprint/15899 | 12051 | 2015-01-01 09:27:06 | 15899 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-11
    Description: The studies provided data on the spoilage pattern of Otolithus argenteus during low temperature preservation. Changes in the total volatile bases, hypoxanthine, tyrosine, salt soluble nitrogen, non-protein nitrogen, pH, peroxide value, free fatty acids and thiobarbituric acid number along with organoleptic score have been reported. Organoleptically, fish stored at +20 degree C remained in acceptable condition upto 12 days while for those stored at 0 degree C in ice upto 19 days. Of the various indices tested Hypoxanthine, salt soluble nitrogen and total volatile bases nitrogen, in the order of merit can be used as freshness tests for refrigerated fish.
    Keywords: Biology ; chilling storage ; storage effects ; quality control ; Otolithus argenteus ; marine ; India
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    Tidal and diel influence on zooplankton occurrence in the Mandovi estuary, Goa (2021)
    In:  http://aquaticcommons.org/id/eprint/15900 | 12051 | 2015-01-01 09:27:49 | 15900 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-11
    Description: Distribution and abundance of zooplankton over the tidal cycle were studied in the Mandovi estuary, Goa, during August and December 1971 and May 1972. Tide induced salinity fluctuations were obvious with high values during spring tides. Salinity was low during August, apparently due to precipitation and land run off but increased subsequently. The mean biomass values for the day and night collections were 13.6 and 19.8 ml/100 m super(3) respectively. Occurrence of most of the zooplankton taxa and species was related to diel rhythm and tidal oscillations. However, overall mean zooplankton standing stock at both the stations were same (16.3 ml/100 m super(3)) indicating that estuarine zooplankton maintained their position during tidal exchanges. Variations in occurrence of common groups and species of zooplankton over the tidal cycle are discussed.
    Keywords: Biology ; Environment ; tidal effects ; population density ; diurnal variations ; population dynamics ; brackish ; Mandovi estuary ; Goa ; India
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    Indigenous construction of fishing boats at Versova village in Maharashtra State (2021)
    In:  http://aquaticcommons.org/id/eprint/15890 | 12051 | 2015-01-01 09:14:42 | 15890 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-11
    Description: Versova, one of the 23 fishing villages in the district of Greater Bombay, is a major fishing centre. During the last three decades mechanisation of fishing boats received a tremendous boost in the state specially in and around Bombay resulting in higher income and gainful employment to fishermen. Indigenous construction of fishing boats at Versova contributes to the marine fisheries development. Inspite of certain constraints in construction activities, training of artisans in boat construction would ultimately help in the economic growth of the village.
    Keywords: Engineering ; Fisheries ; fishery development ; boats ; artisanal fishing ; construction ; marine ; Versova ; Maharashtra ; India
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    Seasonal variation in the proximate composition of rock oyster Saccostrea cucullata from Bombay coast (2021)
    In:  http://aquaticcommons.org/id/eprint/15906 | 12051 | 2015-01-03 09:43:46 | 15906 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-11
    Description: Changes in proximate composition of soft tissue of rock oyster Saccostrea cucullata inhabiting a polluted station at Bandra (stn. B) and a relatively clean area at Mudh Island (stn. M) were studied. An average protein content of 48.88 plus or minus 3.73 and 53.68 plus or minus 3.59% were recorded respectively for oysters from stns. M and B and the difference was significant. Mean carbohydrate content in oysters from stn. M amounted to 14.69 plus or minus 3.22 whereas at stn. B it was 8.70 plus or minus 1.61 and the difference was found highly significant. However, appreciable variation between stations was not observed in lipid and carbon content in oysters. Suitable periods for harvesting of these organisms are suggested.
    Keywords: Biology ; Environment ; Pollution ; biochemical composition ; carbohydrates ; seasonal variations ; histology ; Saccostrea cucullata ; marine ; Bombay ; Maharashtra ; India
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    Assessment of siltation rate and sediment transport in Bombay harbour based on Cesium-137 distribution (2021)
    In:  http://aquaticcommons.org/id/eprint/15883 | 12051 | 2014-12-31 13:15:00 | 15883 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-11
    Description: Low level aqueous radioactive wastes from the nuclear complex at Trombay are discharged into the Bombay harbour. Of the 6 principal radionuclides comprising the discharge, cesium-137 is most predominantly taken up by silt from the sea water. Isoactivity contours show that activity levels just off the point of discharge, and further south to Pir Pau, were between 50 and 100 pCi/g. Activity in the main channel of the harbour remained below 10 pCi/g, while further north (below the Thane Creek bridge) it was around 20 pCi/g. Activity in the top 6 cm of a core off Trombay naval jetty was 〈5 pCi/g, reaching a maximum of 178 pCi/g at 14cm below the surface. Thereafter, it tapered off to 5 pCi/g down to a metre.
    Keywords: Environment ; Pollution ; sediment transport ; radioactive wastes ; silting ; marine ; Bombay ; Maharashtra ; India
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    Record catch of rock perch, Epinephelus fasciatus by bottom trawling off Ratnagiri (2021)
    In:  http://aquaticcommons.org/id/eprint/15872 | 12051 | 2014-12-31 08:47:33 | 15872 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-11
    Description: A productive fishing ground for rock perch (Epinephelus fasciatus) was located off Ratnagiri between 17 degree 00' to 17 degree 10' N latitude and 72 degree 20' to 72 degree 30' E longitude, around a depth of 96m during November, 1983. An average catch of 2 ton/hr. was recorded. Length frequency studies of E. fasciatus indicate the probability of a nursery ground consisting of three brood stocks. Hydrographic studies of the ground revealed that the bottom water was oxygen deficient below a strong thermocline extending from 15-75 m depth with the recorded bottom temperature amounting to 20.5 degree C.
    Keywords: Fisheries ; fishery surveys ; trawling ; fishery oceanography ; fishing grounds ; Epinephelus fasciatus ; marine ; Ratnagiri ; Maharashtra ; India
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    Composition and distribution of benthos in Kali Estuary, Karwar (2021)
    In:  http://aquaticcommons.org/id/eprint/15886 | 12051 | 2014-12-31 13:18:15 | 15886 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-11
    Description: The composition and abundance of meio and macrobenthos in 5 stations of Kali estuary were studied during September 1981 to September 1982. In all sixteen meiobenthic and fourteen macrobenthic taxa were identified and the salient features in their temporal and spatial distribution, species dominance and percentage occurrence are discussed.
    Keywords: Biology ; Ecology ; check lists ; geographical distribution ; meiobenthos ; macrobenthos ; species diversity ; brackish ; Kaly estuary ; Karwar ; Karnataka ; India
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  • 80
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    Role of rainfall in the breeding of Labeo rohita (Ham.), Cirrhinus mrigala (Ham.), Catla catla (Ham.), at Damdama (Haryana), a semi-arid zone (2021)
    In:  http://aquaticcommons.org/id/eprint/15891 | 12051 | 2015-01-01 09:16:05 | 15891 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-11
    Description: The role of several environmental factors on the breeding and hatching of fish has been studied by many earlier investigators. Perfection in the hypophysation technique has helped to some extent in by-passing the environmental variables such as temperature, light and rain. With the use of a modern fish hatchery, it is possible to attain maximum success in breeding and hatching, even without rains; reference is given to studies carried out regarding the role of rainfall in the breeding of Labeo rohita, Cirrhinus mrigala, Catla catla.
    Keywords: Atmospheric Sciences ; Fisheries ; environmental factors ; breeding ; rainfall ; Labeo rohita ; Cirrhinus mrigala ; Catla catla ; freshwater ; India
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    Rearing of major carp spawn at high stocking density under air lift water circulation system (2021)
    In:  http://aquaticcommons.org/id/eprint/15894 | 12051 | 2015-01-01 09:22:41 | 15894 | Indian Fisheries Association
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    Publication Date: 2021-07-11
    Description: The present studies are aimed to achieve a high survival rate of carp spawn to fry stage under Air Lift Water Circulation system at high stocking density. Three experiments using Labeo rohita and Cirrhinus mrigala were conducted in one cement tank of 50 sq.m. area. The results showed a survival rate ranging from 90.5 to 95.2% at stocking density of 20 to 25 million/ha. By this technique it is possible to rear high number of spawn in limited area with high rate of survival up to fry stage.
    Keywords: Aquaculture ; aquaculture techniques ; stocking density ; rearing ; Labeo rohita ; Cirrhinus mrigala ; freshwater ; India
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    Report on two types of leptocephalus-eel from Vellar Estuary (Bay of Bengal) (2021)
    In:  http://aquaticcommons.org/id/eprint/15896 | 12051 | 2015-01-01 09:24:04 | 15896 | Indian Fisheries Association
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    Publication Date: 2021-07-11
    Description: Two types of leptocephalus-eel, identified as ophichthyid larva and Muraenesox cinereus, collected from the Vellar estuary, India, are described. M. cinereus larvae are common in the estuary during November-January whereas ophichthyid larvae are very rare, collected on one occasion (January) only.
    Keywords: Biology ; distribution records ; animal morphology ; Muraenesox cinereus ; brackish ; Vellar estuary ; Bay of Bengal ; India
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    Histochemical studies on the olfactory epithelium of some hillstream teleosts (2021)
    In:  http://aquaticcommons.org/id/eprint/15898 | 12051 | 2015-01-01 09:26:04 | 15898 | Indian Fisheries Association
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    Publication Date: 2021-07-11
    Description: Living specimens of Barilius bendelisis, Crossocheilus latius latius, Torputitora, Glyptothorax pectinopterus and Pseudecheneis sulcatus were collected from the streams and rivers of Garhwal Himalaya. Histochemical localization of carbohydrates (1:2 glycol groups, glycogen, B-metachromasia and acid mucopolysaccharides), proteins and protein bound NH sub(2) group, bound lipids and the enzymes (acid and alkaline phosphatases) in the olfactory epithelium were studied. The receptor, supporting basal and mucous cells show varying degrees of distinction and distribution of these substances. The enzymes are present on the surface of the epithelium, sensory hairs and the boundaries of mucous cells only.
    Keywords: Biology ; epithelia ; olfactory organs ; histochemistry ; Barilius bendelisis ; Glyptothorax pectinopterus ; freshwater ; Garhwal Himalaya ; India
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    Carp seed production during drought year 1987 under controlled hatchery system (2021)
    In:  http://aquaticcommons.org/id/eprint/15907 | 12051 | 2015-01-03 09:44:15 | 15907 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-11
    Description: The introduction of the controlled hatchery system "Model CIFE D-81" resulted in a production of 60 lakhs Indian major carp seed in the drought area of eastern Uttar Pradesh. The hatchery system provided optimum temperature, dissolved oxygen and pH for breeding and hatching and also removed the metabolites generated. The technology is simple and the success of the program attracts pisciculturists.
    Keywords: Aquaculture ; hatcheries ; dissolved oxygen ; aquaculture systems ; controlled conditions ; pH ; temperature ; Cyprinidae ; freshwater ; Uttar Pradesh ; India
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    Distribution of phytoplankton off Mithapur (Gujarat) (2021)
    In:  http://aquaticcommons.org/id/eprint/15911 | 12051 | 2015-01-03 09:46:52 | 15911 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-11
    Description: The area off Mithapur, Gujarat, India, is moderately rich in phytoplankton. The peak in phytoplankton population (av. 7.86 x 10 super(4)/l) was recorded in March. The average count of 0.71 x 10 super(4)/l observed in April was very low and later increased to 3.76 x 10 super(4)/l in December. Fifty-two species were recorded from the area. The most common species were Nitzschia closterium, N. pungens, N. seriata, N. sigma, Chaetoceros simplex, C. difficilis and C. sociale. The importance of Nitzschia spp as indicators of organically polluted environment was discussed.
    Keywords: Biology ; Environment ; pollution indicators ; geographical distribution ; marine ; Mithapur ; Gujarat ; India
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    Some aspects on growth and condition index of Saccostrea cucullata (Born), Cerithium rubus (Desh) and Tellina angulata Gmelin from Bombay coast (2021)
    In:  http://aquaticcommons.org/id/eprint/15922 | 12051 | 2015-01-16 08:44:18 | 15922 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-11
    Description: Size variation, growth, condition index and spawning periodicities of three species of molluscs were studied for a period of 15 months from a polluted and a relatively clean marine habitat near Bombay, Maharashtra, India. Growth of Saccostrea cucullata was 1.2 times and of Cerithium rubus was 1.6 times higher in unpolluted habitat than the polluted water. Spawning was during premonsoon in S. cucullata, post monsoon in C. rubus and monsoon in Tellina angulata. Condition index and percentage edibility values were higher at less polluted stations.
    Keywords: Biology ; condition factors ; pollution effects ; spawning ; marine molluscs ; growth ; Saccostrea cucullata ; marine ; Bombay ; Maharashtra ; India
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    Studies on maturity, spawning and fecundity of Nemipterus japonicus (Bloch) off Bombay coast (2021)
    In:  http://aquaticcommons.org/id/eprint/15926 | 12051 | 2015-01-16 08:50:17 | 15926 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-11
    Description: Studies indicated spawning season of Nemipterus japonicus off Bombay coast (Maharashtra, India), to be during July to December with peak breeding during November to December. Females attained first maturity at the length range 110-120 mm; 50% maturity and spawning occurred at 135 mm within one year of its age. Overall male: female ratio for the entire period of study was 1:1.01. Relationships of fecundity with total length of fish, total ovary weight and per g. fish weight were worked out as F=(-72674.33) L super(739.73); F =65.44 W super(807.33); F=3112.57 W super(22383.27) and F=467.85 W super(4.96) with coefficient of correlation values (r) 0.9090, 0.9443, 0.9911 and 0.8843 respectively.
    Keywords: Biology ; fecundity ; spawning seasons ; correlation analysis ; sexual maturity ; Nemipterus japonicus ; marine ; Bombay ; Maharashtra ; India
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 51-57
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    Seasonal variation in the physico-chemical properties of Rushikulya estuary and its effect on the occurrence of Chanos fry (2021)
    In:  http://aquaticcommons.org/id/eprint/15928 | 12051 | 2015-01-16 08:52:26 | 15928 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-11
    Description: Seasonal variation in some physico-chemical properties of Rushikulya estuary was studied. The surface water temperature varied from 20 to 34.5 degree C, the transparency of the water from 6.3 to 12 cm, the salinity from 28.3 to 32.8 % and the pH from 6.77 to 7.35. The transparency and salinity showed bimodal distribution. Occurrence of the Chanos fry were correlated to it.
    Keywords: Chemistry ; Environment ; temperature data ; nursery grounds ; seasonal variations ; salinity data ; estuary ; Chanos chanos ; marine ; Rushikulya river ; Odisha ; Orissa ; India
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 69-71
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    Studies on fish epidemics from Assam (2021)
    In:  http://aquaticcommons.org/id/eprint/15929 | 12051 | 2015-01-16 08:53:37 | 15929 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-11
    Description: Investigations conducted since July 1988 on ulcerative fish epidemics in Assam, India, indicated that mainly four species of fishes belonging to the genera Puntius, Channa, Macrognathus and Mystus were widely affected by the disease. Results indicated that outbreak of the disease may not be due to organic pollution of water or radioactive and heavy-metallic contamination. Bacterial culture revealed colonies of Escherichia coli and Pseudomonas aeruginosa in the surface muscular lesions and gill tissues while preliminary electron microscopic studies indicated the presence of viruses in the muscles and gills of diseased fishes.
    Keywords: Biology ; fish diseases ; epidemics ; electron microscopy ; Puntius ; Channa ; Escherichia coli ; Macrognathus ; Pseudomonas aeruginosa ; Mystus ; freshwater ; Assam ; India
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 73-75
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    Algae and water pollution in Mahi Estuary (2021)
    In:  http://aquaticcommons.org/id/eprint/15936 | 12051 | 2015-01-16 09:02:03 | 15936 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-11
    Description: Distribution of phytoplankton, chlorophyll A and phaeophytin was studied at different locations in the Mahi Estuary, Gujarat, India during 1982. The water quality at the discharge point was poor while the region away from it was relatively unpolluted. The results indicated a wide range of variation in phytoplankton population (7.68-5010, 96 x 10 super(4) cells/l, chl. a 2.22-58.22 mg/m super(3) and phaeophytin [0.20-10.21 mg/m super(3)]. The ratio of chl. a/phaeophytin were remarkably low at highly polluted stations. Higher abundance of the genera Oscillatoria and Nitzschia were recorded at polluted stations. The diversity of species at the unpolluted station was higher (1.56) as compared to the polluted station (1.07).
    Keywords: Biology ; Pollution ; brackishwater pollution ; pollution effects ; algae ; species diversity ; Nitzschia ; Oscillatoria ; Mahi river estuary ; Gujarat ; India
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 31-37
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    Length weight relationship and biometric study on three species of sciaenids from Bombay water (2021)
    In:  http://aquaticcommons.org/id/eprint/16015 | 12051 | 2015-01-24 15:08:14 | 16015 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-12
    Description: The length-weight relationship and biometric study of three species of sciaenids viz. Othlithes cuvieri, Johnieops vogleri and Johnius macrorhynus are reported. For all the three species the regression coefficient between the sexes was found to be not significant at 5% level. Biometric study indicates that correlation among the various characters compared was fairly good while the meristic data agree well with published data.
    Keywords: Biology ; marine fish ; length-weight relationships ; Johnius macrorhynus ; Otolithes cuvieri ; Johnieops vogleri ; Bombay ; Maharashtra ; India
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 41-48
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    Present status and problems of mussel culture in India (2021)
    In:  http://aquaticcommons.org/id/eprint/15950 | 12051 | 2015-01-16 09:21:57 | 15950 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-11
    Description: Two species of mussels, the green mussel (Perna viridis) and the brown mussel (Perna indica) were cultured using the seed collected from the natural beds of the east and west coasts of India. The results of culture experiments are consolidated and the present status is reviewed. Although the culture experiments gave encouraging results, problems such as mooring of rafts in highly turbulent coastal waters, large scale seed requirements, control of predation, legal problems and marketing of end products require urgent attention before undertaking commercial operations. Some of the major problems of mussel culture are outlined for formulating effective management policies and their implementation for commercial mussel farming in India.
    Keywords: Aquaculture ; aquaculture development ; aquaculture techniques ; aquaculture systems ; Perna viridis ; Perna indica ; marine ; India
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 39-46
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    Influence of salinity on population growth of a rotifer, Brachionus plicatilis (Mullen) (2021)
    In:  http://aquaticcommons.org/id/eprint/15953 | 12051 | 2015-01-16 09:38:57 | 15953 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-11
    Description: The rotifer Brachionus plicatilis plays an important role in prawn hatcheries. It tolerates a wide range of salinities. The present experiments were conducted to find the optimum salinity for its mass culture. Experiments conducted on various ranges of salinities starting from 0 to 40 ppt at an interval of 5 ppt revealed that Brachionus plicatilis did not survive at salinities 0 and 40 ppt. Optimum salinity studies conducted at 5-15 ppt with an interval of 1 ppt showed that the production of 70 individuals/ml was highest at 10 ppt salinity and the doubling time ranged from 1.728 to 1.317 days.
    Keywords: Aquaculture ; Biology ; salinity effects ; shrimp culture ; mass culture ; zooplankton culture ; Brachionus plicatilis ; marine ; India
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 75-81
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    A simple technique of controlled breeding of carps in semi-arid environment (2021)
    In:  http://aquaticcommons.org/id/eprint/15957 | 12051 | 2015-01-16 09:42:35 | 15957 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-11
    Description: A semi-arid environment is a major constraint for production of carp seed through hypophysation. At a water temperature above 31 degree C fishes often fail to respond to induced breeding or produce partial or full eggs with fairly less fertilization, leading to their mortality during embryonic development. Field trials with Labee rohita and Cyprinus carpio communis prove that hypophysation followed by stripping and hatching in a water medium with reduced temperature (below 31 degree C) through controlled use of ice-water and water showers can result in 50-60% fertilization of eggs and 50-72% hatching for L. rohita, and 40-90% fertilization and 49-77% hatching for C. carpio communis. Simultaneous breeding experiments of the species in normal water temperature (〉31 degree C) showed negative results.
    Keywords: Aquaculture ; arid environments ; induced breeding ; aquaculture techniques ; temperature effects ; Labeo rohita ; Cyprinus carpio communis ; freshwater ; India
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 89-96
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    Culture of Moina micrura on various organic waste products (2021)
    In:  http://aquaticcommons.org/id/eprint/15962 | 12051 | 2015-01-16 09:46:28 | 15962 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-11
    Description: Moina micrura, a cladoceran species, is considered to be one of the best live food organisms for rearing the young larval stages of fish and prawn. Considering the importance of this species in hatchery operations the present study was undertaken to record its fecundity and life span and to culture it using different locally available organic waste products. In indoor culture, a maximum production of 2600 ind/1 and a minimum of 1050 ind/1 were obtained when treated with gram + maize oilcake and "till" oilcake respectively. In outdoor culture, a highest production of 6000 ind/1 was achieved with "Alsi" and "till" oilcakes and a lowest density of 1050 ind/1 with coconut oilcake and raw cattle dung was obtained with an inoculation rate of 5 ind/1.
    Keywords: Aquaculture ; Biology ; food organisms ; organic wastes ; diets ; aquaculture systems ; Moina micrura ; India
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 129-134
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    Gears and craft of Karwar: an overview (2021)
    In:  http://aquaticcommons.org/id/eprint/15975 | 12051 | 2015-01-16 09:56:52 | 15975 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-11
    Description: An account is given of the different types of gears and craft used to catch the pelagic and demersal fish in the inshore and estuary waters of Karwar, India. The main types of craft used during the fishing season September-May are: rampani boats, yendi boats, out-rigger boats, plank-built and dug-out canoes; important gears include: rampani, yendi, shore-seines, gill nets, boat seines, drift nets and hook and lines. Mechanized fishing, introduced during the sixties and seventies, included trawling and purse-seining. The types of gears used by the traditional fishermen depend on local conditions, seasons and distance covered from the shore. The major share to the total landings of fish in Karwar coast is brought mainly by the mechanized craft.
    Keywords: Fisheries ; fishing vessels ; fishing gear ; mechanization ; artisanal fishing ; marine ; Karwar ; Karnataka ; Arabian sea ; India
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 245-252
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    Biodeterioration of wooden boats: a major problem facing marine fisheries (2021)
    In:  http://aquaticcommons.org/id/eprint/15979 | 12051 | 2015-01-16 09:59:41 | 15979 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-11
    Description: In India, the fishing industry alone incurs an annual loss of over 120 million rupees on account of biodeterioration of wooden fishing craft. None of the timber species, currently in demand for boat-building, possesses an natural bioresistance and will be completely destroyed within 6 to 12 months. Preventive measures against biodeterioration range from application of several indigenous formulations to metallic sheathings and pressure impregnation of wood with preservative chemicals. These methods do not provide lasting protection, as each has its own short-comings and inadequacies. The need for long-term research in the field of marine biodeterioration for improving the efficiency of currently known control measures, with emphasis on application of non-polluting biological methods, is stressed.
    Keywords: Fisheries ; fishing vessels ; wood ; biological damage ; boats ; artisanal fishing ; chemical control ; marine ; India
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 275-282
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    Marine pollution and zooplankton: some recent trends in marine pollution studies (2021)
    In:  http://aquaticcommons.org/id/eprint/15983 | 12051 | 2015-01-19 15:48:04 | 15983 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-11
    Description: The presence of even very minute quantities of pollutants may become harmful either due to their direct effect on zooplankton or indirectly due to the transfer of the pollutants to other trophic levels through zooplankton. The recent trend in marine pollution studies is therefore to find out the effects of very minute quantities of these pollutants on marine zooplankton and the methods of their accumulation and transfer to the organisms of higher trophic level including man. A review of laboratory and field studies concerning the effects of pollutants such as hydrocarbons, crude oil, heavy metals, pesticides and heated waste water on the survival, breeding, movement, faecal pellet production, growth and development on marine zooplankton is presented.
    Keywords: Biology ; Pollution ; trophic levels ; biological production ; pollution effects ; zooplankton ; food webs ; marine ; India
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 307-326
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    Studies on the status of pollution in certain estuarine areas in Kakinada (2021)
    In:  http://aquaticcommons.org/id/eprint/15994 | 12051 | 2015-01-19 16:01:03 | 15994 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-11
    Description: The BOD levels and saprotrophication of 2 stations in an estuarine habitat at Kakinada India, was studied during one full tidal cycle. Both the stations were found to be heavily polluted by sewage with BOD values ranging between 10.8 and 12.8 ppm at the commercial canal (station 1) and between 4.8 and 8.8 ppm at the mangrove creek (station 2). Tides did not seem to have much influence on the dilution of the pollutants. Based on planktonic indicator species observed and saprobity index which worked out to be 2.75, both the sampling areas are considered as heavily polluted alpha-mesosaprobic zones.
    Keywords: Environment ; Pollution ; estuaries ; pollution monitoring ; biochemical oxygen demand ; dilution ; pollution dispersion ; brackish ; Kakinada ; East Godavari district ; Andhra Pradesh ; India
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 441-448
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    Distribution of decapod larvae in the Bombay Harbour-Thana-Bassein Creek regions (2021)
    In:  http://aquaticcommons.org/id/eprint/16013 | 12051 | 2015-01-24 15:03:17 | 16013 | Indian Fisheries Association
    Details
    Publication Date: 2021-07-12
    Description: Variations in the abundance and composition of larval decapods were studied from 90 km stretch of the Bombay Harbour-Thana Creek-Bassein Creek (BHTCBC) system for a period of 15 months. The larvae belonged to Penacidea, Caridea, Anomura and Brachyura. Among these, brachyurans were the most abundant in the entire study area indicating good potential for crab fishery. Penaeus, Metapenaeus and Parapenaeopsis were the genera recorded in the family Penaeidae of which Metapenaeus spp. were the most common. Generally there was a higher abundance of Penaeus and Metapenaeus during monsoon probably indicating intense breeding. A few genera of decapods showed patchy occurrence in this system. Results of this first investigation were quantitatively and qualitatively evaluated with comments on fishery potential of the commercially important groups of decapods.
    Keywords: Biology ; Fisheries ; crab fisheries ; shrimp fisheries ; marine ; Bombay ; Maharashtra ; India
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 21-32
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